Our setup runs vcredist_x86.exe with Parameter /qb to make it silent. This works on all of our test systems, but unfortunately the installation still shows a message on a customer computer.
Please look at the image below – does anyone guess or know the origin of this message? I couldn’t find anything here and on Google, someone said that it happens for English Windows XP (which the customer has) but not on the German.
InnoSetup has full administrative rights and lauches vcredist_x86.exe version 9.0.21022.8 in its [Run] section. Our application is not written in VC, but used the GAUSS Run-Time Engine which is.

I had the same problem, whe tried to install vcredist_x86 with different from OS language (Windows 2003 Eng and vncredist Rus), when i download vcredist with proper language, it install successfully.
Also, you can see install log in %TEMP%\dd_vcredist*.txt
In my case it was said: