Installing AutoCAD Architectural Desktop (ADT R14) on Windows 11
As an existing AutoCAD Architectural Desktop (ADT R14) User, you most likely cannot do without your beloved AutoCAD ADT. With the latest hardware and required move to new Windows versions, trying to install your AutoCAD gives an error like this one…
Windows 16bit setup error – This app can’t run on your PC
or
“FATAL ERROR: HEAP ERROR”
or
MEM_BAD_POINTER
…all is not lost, follow these instructions to install your ADT R14 on Windows 11…
Ransomware Protection Windows 11 and AutoCAD
Just before we start note that Windows 11 comes with a Ransomware Protection which includes Controlled Folder Access. Controlled folder access blocks applications from writing to your Documents, Pictures, Videos, Music, Public and Favorites folders. AutoCAD versions all the way to AutoCAD 2021 write to certain user Public folders and are therefore blocked by this feature. This can cause issues with all sorts of things including activating your AutoCAD license and even running AutoCAD. Ransomware Protection is an important feature of Windows 11 but it will affect your AutoCAD unless you allow AutoCAD and its dependent applications access to the controlled folders.
How to install AutoCAD ADT R14
A quick word of advice: please follow the instructions below precisely as documented including using the same folder names and paths. This will significantly reduce the risk of having any problems…
If you have crashing problems using the File->Open or File->Save dialogs inside of AutoCAD please read this blog entry on the File->Open or File->Save Crash in AutoCAD
If your AutoCAD setup is not starting after 45 minutes…
First try turning off UAC, rebooting, then restart the steps above.
If it is still failing, most likely it’s because of another application on your system which is preventing our setup routine from starting (perhaps anti-virus, or similar) – try installing R14 from Windows Safe Mode
If you are getting either a Bad Mem Pointer error and or a Smartheap handler recursively re-entered error when you start your AutoCAD R14 then you need to re-run all the steps above, taking care to do each step precisely as it says, most likely you are missing from step 5 or you have not installed to c:\acadR14 as stated in step (7) above.
When starting AutoCAD, if you receive an ‘acad.exe – System Error’ message: The program can’t start because ac1st15.dll is missing from your computer. Try reinstalling the program to fix this problem. If you carried out step (7) above, then try rebooting your PC
Using the “…” button, pick your acad.exe folder e.g. c:\acadr14
Click “Fix Old Program” and follow prompts
If you have crashing problems using the File->Open or File->Save dialogs inside of AutoCAD please read this blog entry on the File->Open or File->Save Crash in AutoCAD
Once rebooted, you can now run your AutoCAD ADT R14, using Windows Explorer, navigate to c:\adtR14 and double click acad.exe (we recommend creating a Desktop shortcut for easy access)
Troubleshooting
If your AutoCAD setup is not starting after 45 minutes…
First try turning off UAC, rebooting, then restart the steps above.
If it is still failing, most likely it’s because of another application on your system which is preventing our setup routine from starting (perhaps anti-virus, or similar) – try installing R14 from Windows Safe Mode
If you are getting either a Bad Mem Pointer error and or a Smartheap handler recursively re-entered error when you start your AutoCAD R14 then you need to re-run all the steps above, taking care to do each step precisely as it says, most likely you are missing from step 5 or you have not installed to c:\acadR14 as stated in step (7) above.
When starting AutoCAD, if you receive an ‘acad.exe – System Error’ message: The program can’t start because ac1st15.dll is missing from your computer. Try reinstalling the program to fix this problem. If you carried out step (7) above, then try rebooting your PC
Using the “…” button, pick your acad.exe folder e.g. c:\acadr14
Click “Fix Old Program” and follow prompts
If you have crashing problems using the File->Open or File->Save dialogs inside of AutoCAD please read this blog entry on the File->Open or File->Save Crash in AutoCAD
When you get to the installation folder input dialog **it’s vitally important to make sure you install to c:\adtR14 (not Program Files\AutoCAD Architectural Desktop as usually prompted)**
Once your AutoCAD setup has completed the installation…
Make sure you fully close the setup program.
Once the setup is closed the Converter will automatically fix the newly installed program files for you automatically (inside folder c:\adtR14). You should see “Success!” displayed in the 3rd tab named “Old AutoCAD Program Reviver“
Now reboot your PC
Once rebooted, you can now run your AutoCAD ADT R14, using Windows Explorer, navigate to c:\adtR14 and double click acad.exe (we recommend creating a Desktop shortcut for easy access)
Troubleshooting
If your AutoCAD setup is not starting after 45 minutes…
First try turning off UAC, rebooting, then restart the steps above.
If it is still failing, most likely it’s because of another application on your system which is preventing our setup routine from starting (perhaps anti-virus, or similar) – try installing R14 from Windows Safe Mode
If you are getting either a Bad Mem Pointer error and or a Smartheap handler recursively re-entered error when you start your AutoCAD R14 then you need to re-run all the steps above, taking care to do each step precisely as it says, most likely you are missing from step 5 or you have not installed to c:\acadR14 as stated in step (7) above.
When starting AutoCAD, if you receive an ‘acad.exe – System Error’ message: The program can’t start because ac1st15.dll is missing from your computer. Try reinstalling the program to fix this problem. If you carried out step (7) above, then try rebooting your PC
Using the “…” button, pick your acad.exe folder e.g. c:\acadr14
Click “Fix Old Program” and follow prompts
If you have crashing problems using the File->Open or File->Save dialogs inside of AutoCAD please read this blog entry on the File->Open or File->Save Crash in AutoCAD
navigate through each setup dialog as normal, with these exceptions…
Make sure you do a Typical Install (not a Full Install)
When you get to the installation folder input dialog **it’s vitally important to make sure you install to c:\adtR14 (not Program Files\AutoCAD Architectural Desktop as usually prompted)**
Now carry on with the install
Do not reboot once the install is complete
Ignore any errors related to not being able to create the shortcut e.g. “Cannot Create folder ‘AutoCAD Architectural Desktop’“, you will have to create a shortcut on your computer Desktop to your c:\adtR14\acad.exe by hand.
Again, do not reboot if prompted to do so
Once your AutoCAD setup has completed the installation…
Make sure you fully close the setup program.
Once the setup is closed the Converter will automatically fix the newly installed program files for you automatically (inside folder c:\adtR14). You should see “Success!” displayed in the 3rd tab named “Old AutoCAD Program Reviver“
Now reboot your PC
Once rebooted, you can now run your AutoCAD ADT R14, using Windows Explorer, navigate to c:\adtR14 and double click acad.exe (we recommend creating a Desktop shortcut for easy access)
Troubleshooting
If your AutoCAD setup is not starting after 45 minutes…
First try turning off UAC, rebooting, then restart the steps above.
If it is still failing, most likely it’s because of another application on your system which is preventing our setup routine from starting (perhaps anti-virus, or similar) – try installing R14 from Windows Safe Mode
If you are getting either a Bad Mem Pointer error and or a Smartheap handler recursively re-entered error when you start your AutoCAD R14 then you need to re-run all the steps above, taking care to do each step precisely as it says, most likely you are missing from step 5 or you have not installed to c:\acadR14 as stated in step (7) above.
When starting AutoCAD, if you receive an ‘acad.exe – System Error’ message: The program can’t start because ac1st15.dll is missing from your computer. Try reinstalling the program to fix this problem. If you carried out step (7) above, then try rebooting your PC
Using the “…” button, pick your acad.exe folder e.g. c:\acadr14
Click “Fix Old Program” and follow prompts
If you have crashing problems using the File->Open or File->Save dialogs inside of AutoCAD please read this blog entry on the File->Open or File->Save Crash in AutoCAD
navigate through each setup dialog as normal, with these exceptions…
Make sure you do a Typical Install (not a Full Install)
When you get to the installation folder input dialog **it’s vitally important to make sure you install to c:\adtR14 (not Program Files\AutoCAD Architectural Desktop as usually prompted)**
Now carry on with the install
Do not reboot once the install is complete
Ignore any errors related to not being able to create the shortcut e.g. “Cannot Create folder ‘AutoCAD Architectural Desktop’“, you will have to create a shortcut on your computer Desktop to your c:\adtR14\acad.exe by hand.
Again, do not reboot if prompted to do so
Once your AutoCAD setup has completed the installation…
Make sure you fully close the setup program.
Once the setup is closed the Converter will automatically fix the newly installed program files for you automatically (inside folder c:\adtR14). You should see “Success!” displayed in the 3rd tab named “Old AutoCAD Program Reviver“
Now reboot your PC
Once rebooted, you can now run your AutoCAD ADT R14, using Windows Explorer, navigate to c:\adtR14 and double click acad.exe (we recommend creating a Desktop shortcut for easy access)
Troubleshooting
If your AutoCAD setup is not starting after 45 minutes…
First try turning off UAC, rebooting, then restart the steps above.
If it is still failing, most likely it’s because of another application on your system which is preventing our setup routine from starting (perhaps anti-virus, or similar) – try installing R14 from Windows Safe Mode
If you are getting either a Bad Mem Pointer error and or a Smartheap handler recursively re-entered error when you start your AutoCAD R14 then you need to re-run all the steps above, taking care to do each step precisely as it says, most likely you are missing from step 5 or you have not installed to c:\acadR14 as stated in step (7) above.
When starting AutoCAD, if you receive an ‘acad.exe – System Error’ message: The program can’t start because ac1st15.dll is missing from your computer. Try reinstalling the program to fix this problem. If you carried out step (7) above, then try rebooting your PC
Using the “…” button, pick your acad.exe folder e.g. c:\acadr14
Click “Fix Old Program” and follow prompts
If you have crashing problems using the File->Open or File->Save dialogs inside of AutoCAD please read this blog entry on the File->Open or File->Save Crash in AutoCAD
navigate through each setup dialog as normal, with these exceptions…
Make sure you do a Typical Install (not a Full Install)
When you get to the installation folder input dialog **it’s vitally important to make sure you install to c:\adtR14 (not Program Files\AutoCAD Architectural Desktop as usually prompted)**
Now carry on with the install
Do not reboot once the install is complete
Ignore any errors related to not being able to create the shortcut e.g. “Cannot Create folder ‘AutoCAD Architectural Desktop’“, you will have to create a shortcut on your computer Desktop to your c:\adtR14\acad.exe by hand.
Again, do not reboot if prompted to do so
Once your AutoCAD setup has completed the installation…
Make sure you fully close the setup program.
Once the setup is closed the Converter will automatically fix the newly installed program files for you automatically (inside folder c:\adtR14). You should see “Success!” displayed in the 3rd tab named “Old AutoCAD Program Reviver“
Now reboot your PC
Once rebooted, you can now run your AutoCAD ADT R14, using Windows Explorer, navigate to c:\adtR14 and double click acad.exe (we recommend creating a Desktop shortcut for easy access)
Troubleshooting
If your AutoCAD setup is not starting after 45 minutes…
First try turning off UAC, rebooting, then restart the steps above.
If it is still failing, most likely it’s because of another application on your system which is preventing our setup routine from starting (perhaps anti-virus, or similar) – try installing R14 from Windows Safe Mode
If you are getting either a Bad Mem Pointer error and or a Smartheap handler recursively re-entered error when you start your AutoCAD R14 then you need to re-run all the steps above, taking care to do each step precisely as it says, most likely you are missing from step 5 or you have not installed to c:\acadR14 as stated in step (7) above.
When starting AutoCAD, if you receive an ‘acad.exe – System Error’ message: The program can’t start because ac1st15.dll is missing from your computer. Try reinstalling the program to fix this problem. If you carried out step (7) above, then try rebooting your PC
Using the “…” button, pick your acad.exe folder e.g. c:\acadr14
Click “Fix Old Program” and follow prompts
If you have crashing problems using the File->Open or File->Save dialogs inside of AutoCAD please read this blog entry on the File->Open or File->Save Crash in AutoCAD
navigate through each setup dialog as normal, with these exceptions…
Make sure you do a Typical Install (not a Full Install)
When you get to the installation folder input dialog **it’s vitally important to make sure you install to c:\adtR14 (not Program Files\AutoCAD Architectural Desktop as usually prompted)**
Now carry on with the install
Do not reboot once the install is complete
Ignore any errors related to not being able to create the shortcut e.g. “Cannot Create folder ‘AutoCAD Architectural Desktop’“, you will have to create a shortcut on your computer Desktop to your c:\adtR14\acad.exe by hand.
Again, do not reboot if prompted to do so
Once your AutoCAD setup has completed the installation…
Make sure you fully close the setup program.
Once the setup is closed the Converter will automatically fix the newly installed program files for you automatically (inside folder c:\adtR14). You should see “Success!” displayed in the 3rd tab named “Old AutoCAD Program Reviver“
Now reboot your PC
Once rebooted, you can now run your AutoCAD ADT R14, using Windows Explorer, navigate to c:\adtR14 and double click acad.exe (we recommend creating a Desktop shortcut for easy access)
Troubleshooting
If your AutoCAD setup is not starting after 45 minutes…
First try turning off UAC, rebooting, then restart the steps above.
If it is still failing, most likely it’s because of another application on your system which is preventing our setup routine from starting (perhaps anti-virus, or similar) – try installing R14 from Windows Safe Mode
If you are getting either a Bad Mem Pointer error and or a Smartheap handler recursively re-entered error when you start your AutoCAD R14 then you need to re-run all the steps above, taking care to do each step precisely as it says, most likely you are missing from step 5 or you have not installed to c:\acadR14 as stated in step (7) above.
When starting AutoCAD, if you receive an ‘acad.exe – System Error’ message: The program can’t start because ac1st15.dll is missing from your computer. Try reinstalling the program to fix this problem. If you carried out step (7) above, then try rebooting your PC
Using the “…” button, pick your acad.exe folder e.g. c:\acadr14
Click “Fix Old Program” and follow prompts
If you have crashing problems using the File->Open or File->Save dialogs inside of AutoCAD please read this blog entry on the File->Open or File->Save Crash in AutoCAD
Double click the zip file to open it and install the TLC application as normal. By the way, TLC stands for The Longbow Converter
Once installed, start the Longbow Converter App…
Now place your AutoCAD ADT R14 CD in the CDRom Drive
In the Converter App, select the 2nd tab named “Old AutoCAD Installer Reviver“
Using the “. . .” button, select your AutoCAD installation CD
Next, click the “Run Old Installer” button and follow the onscreen instructions. If all is well a dialog will appear stating success, simply click OK to start your AutoCAD setup
Now I know it’s unheard of these days, but at this point expect to wait up to 45 minutes for your AutoCAD setup.exe program to appear, be patient – NOTE: do not continue with the install until reading the next step…
Once the setup starts, stop and read the next steps all the way to the end! By the way, if your AutoCAD ADT R14 setup does not start after 45 minutes, read the Troubleshooting section below.
In the AutoCAD setup program…
navigate through each setup dialog as normal, with these exceptions…
Make sure you do a Typical Install (not a Full Install)
When you get to the installation folder input dialog **it’s vitally important to make sure you install to c:\adtR14 (not Program Files\AutoCAD Architectural Desktop as usually prompted)**
Now carry on with the install
Do not reboot once the install is complete
Ignore any errors related to not being able to create the shortcut e.g. “Cannot Create folder ‘AutoCAD Architectural Desktop’“, you will have to create a shortcut on your computer Desktop to your c:\adtR14\acad.exe by hand.
Again, do not reboot if prompted to do so
Once your AutoCAD setup has completed the installation…
Make sure you fully close the setup program.
Once the setup is closed the Converter will automatically fix the newly installed program files for you automatically (inside folder c:\adtR14). You should see “Success!” displayed in the 3rd tab named “Old AutoCAD Program Reviver“
Now reboot your PC
Once rebooted, you can now run your AutoCAD ADT R14, using Windows Explorer, navigate to c:\adtR14 and double click acad.exe (we recommend creating a Desktop shortcut for easy access)
Troubleshooting
If your AutoCAD setup is not starting after 45 minutes…
First try turning off UAC, rebooting, then restart the steps above.
If it is still failing, most likely it’s because of another application on your system which is preventing our setup routine from starting (perhaps anti-virus, or similar) – try installing R14 from Windows Safe Mode
If you are getting either a Bad Mem Pointer error and or a Smartheap handler recursively re-entered error when you start your AutoCAD R14 then you need to re-run all the steps above, taking care to do each step precisely as it says, most likely you are missing from step 5 or you have not installed to c:\acadR14 as stated in step (7) above.
When starting AutoCAD, if you receive an ‘acad.exe – System Error’ message: The program can’t start because ac1st15.dll is missing from your computer. Try reinstalling the program to fix this problem. If you carried out step (7) above, then try rebooting your PC
Using the “…” button, pick your acad.exe folder e.g. c:\acadr14
Click “Fix Old Program” and follow prompts
If you have crashing problems using the File->Open or File->Save dialogs inside of AutoCAD please read this blog entry on the File->Open or File->Save Crash in AutoCAD
If you don’t yet have a copy of the Longbow Converter App you can purchase it hereor click on the download link we sent you via email in order to download the Converter App to your PC.
Before installing the Converter App, make sure the files downloaded from our site are not blocked by Windows SmartScreen… Windows 11 is finicky, click the TLC zip first to make sure it’s fully selected then Right+click the file and select Properties. Be sure to check the Unblock checkbox as shown below and click OK…
Double click the zip file to open it and install the TLC application as normal. By the way, TLC stands for The Longbow Converter
Once installed, start the Longbow Converter App…
Now place your AutoCAD ADT R14 CD in the CDRom Drive
In the Converter App, select the 2nd tab named “Old AutoCAD Installer Reviver“
Using the “. . .” button, select your AutoCAD installation CD
Next, click the “Run Old Installer” button and follow the onscreen instructions. If all is well a dialog will appear stating success, simply click OK to start your AutoCAD setup
Now I know it’s unheard of these days, but at this point expect to wait up to 45 minutes for your AutoCAD setup.exe program to appear, be patient – NOTE: do not continue with the install until reading the next step…
Once the setup starts, stop and read the next steps all the way to the end! By the way, if your AutoCAD ADT R14 setup does not start after 45 minutes, read the Troubleshooting section below.
In the AutoCAD setup program…
navigate through each setup dialog as normal, with these exceptions…
Make sure you do a Typical Install (not a Full Install)
When you get to the installation folder input dialog **it’s vitally important to make sure you install to c:\adtR14 (not Program Files\AutoCAD Architectural Desktop as usually prompted)**
Now carry on with the install
Do not reboot once the install is complete
Ignore any errors related to not being able to create the shortcut e.g. “Cannot Create folder ‘AutoCAD Architectural Desktop’“, you will have to create a shortcut on your computer Desktop to your c:\adtR14\acad.exe by hand.
Again, do not reboot if prompted to do so
Once your AutoCAD setup has completed the installation…
Make sure you fully close the setup program.
Once the setup is closed the Converter will automatically fix the newly installed program files for you automatically (inside folder c:\adtR14). You should see “Success!” displayed in the 3rd tab named “Old AutoCAD Program Reviver“
Now reboot your PC
Once rebooted, you can now run your AutoCAD ADT R14, using Windows Explorer, navigate to c:\adtR14 and double click acad.exe (we recommend creating a Desktop shortcut for easy access)
Troubleshooting
If your AutoCAD setup is not starting after 45 minutes…
First try turning off UAC, rebooting, then restart the steps above.
If it is still failing, most likely it’s because of another application on your system which is preventing our setup routine from starting (perhaps anti-virus, or similar) – try installing R14 from Windows Safe Mode
If you are getting either a Bad Mem Pointer error and or a Smartheap handler recursively re-entered error when you start your AutoCAD R14 then you need to re-run all the steps above, taking care to do each step precisely as it says, most likely you are missing from step 5 or you have not installed to c:\acadR14 as stated in step (7) above.
When starting AutoCAD, if you receive an ‘acad.exe – System Error’ message: The program can’t start because ac1st15.dll is missing from your computer. Try reinstalling the program to fix this problem. If you carried out step (7) above, then try rebooting your PC
Using the “…” button, pick your acad.exe folder e.g. c:\acadr14
Click “Fix Old Program” and follow prompts
If you have crashing problems using the File->Open or File->Save dialogs inside of AutoCAD please read this blog entry on the File->Open or File->Save Crash in AutoCAD
I just joined the Longbow Software team as a Software Engineer, and I have gladly offered to post some informative blogs for you all to read. Check on the left there, for all my blog entries...
