I absolutely hate 1603 errors!
I recently got this interesting case with AutoCAD 2013 and this wonderful message: Installation Complete. Some products failed to install.
When you look at the log file, you get this error:
2012/9/27:08:33:05 slick STLR-MAPS-02 Install Microsoft Visual C++ 2005 SP1 Redistributable ATL Security Update (x86) Failed Installation aborted, Result=1603
The first plan to attack is to try to uninstall all the C++ components. It is a very similar workflow to these blog posts:
This did NOT resolve the issue
In this interesting scenario, the problem was with the temp folder. I was trying to get access the log files and I typed this in the Start > Search programs and files window:
...and I got this error:
Windows cannot find 'C:\Temp'. Make sure you typed the name correctly. and then try again.
WOW, how old school Windows NT!
In this case, the problem was rather simple, create a C:\Temp folder. Once the C:\Temp folder was created, AutoCAD installed!
Personally, I would have kept the default settings for the TEMP and TMP folder as: