The 1603 MSI installer error is a generic error code “A fatal error occurred during installation” on Windows 7, Windows 8 or Windows 10. Basically, it’s not specific; anything could have gone wrong.
Microsoft document this error and lots of possible ways to solve it here…
Aside from the Microsoft documented 1603 errors above, AutoCAD itself has numerous issues with their installer mechanism which when failures occur can also generate the generic 1603 MSI error code.
It seems that AutoCAD 2020 has some issues installing mainly due to their Licensing system component.
Installation incomplete. Some products failed to install.
AutoCAD 2020 did not install (error code: 1603)
Autodesk documents how to fix it here
There is an App built which specifically scans AutoCAD’s setup so that either the 1603 error is gone (fixed) or it does not affect the install… Check out the blogs on how to fix your AutoCAD’s 1603 error (if your version is not listed below use the search box at the top right of this page)
These instructions solve issues around installing/running your 32bit AutoCAD 2016 on 64bit Windows 11. Some common issues are error messages…
Affecting all versions of AutoCAD and AutoCAD LT 2014, 2015 and 2016 Random shutdown on startup or opening of DWG…
Installing Autodesk Mechanical Desktop R4 on Windows 11 is not normally possible, you will run into lots of problems including…
Follow these instructions to solve issues around installing/running your legacy AutoCAD LDT 2002 on Windows 11. It requires the purchase…
As an existing AutoCAD Architectural Desktop (ADT R14) User, you most likely cannot do without your beloved AutoCAD ADT. With…
If you are running AutoCAD LT 2014 on Windows 11 and you receive this error... FATAL ERROR: (0x7ffb71c40005) C:\Program Files\Autodesk\AutoCAD…
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2017/2/23:12:42:02 Gautam GAUTAM-PC === Installation started on GAUTAM-PC by Gautam ===
2017/2/23:12:42:04 Gautam GAUTAM-PC Install MSI Runtime 3.1 Skipped Windows Installer upgrade is not required. System Version = 5.0.7601.18896
2017/2/23:12:42:04 Gautam GAUTAM-PC Install .NET Framework Runtime 2.0 Skipped .NET Framework Runtime upgrade is not required. System Version = 2.0.50727.0
2017/2/23:12:42:04 Gautam GAUTAM-PC Install .NET Framework Runtime 2.0 Language Pack Skipped Installation not required
2017/2/23:12:42:44 Gautam GAUTAM-PC Install DirectX 9.0 Runtime Succeeded Command = "support\DirectX\DXSETUP.exe" /silent
2017/2/23:12:42:44 Gautam GAUTAM-PC Install MDAC 2.7 Skipped MDAC upgrade is not required. System Version = 6.1.7601.17514
2017/2/23:12:43:05 Gautam GAUTAM-PC Install Autodesk DWF Viewer Succeeded Command = "support\aev\DWFViewerSetup.exe" /u2 /q2 /b0
2017/2/23:12:43:06 Gautam GAUTAM-PC Install Flash Failed Failure is ignored, Result=1
2017/2/23:12:48:54 Gautam GAUTAM-PC Install AutoCAD 2007 Failed Installation aborted, Result=1603
2017/2/23:12:48:54 Gautam GAUTAM-PC === Installation ended ===
Please contact Longbow Software support directly, they can help – https://shop.longbowsoftware.com/contact-send.sc
Review the setup log, check to see if the installer is failing on installing multiple components.