Ehm... you can stop this behavior far easier than editing a registry

go into game folder in SteamApps\common
Do a search for installscript.vdf in explorer and delete it (3 instances)

If you want to do it manually, there are 3 installscript.vdf and they are in \DirectX\Jun2010 | \DotNet\3.5 | \vcredist\2008

I would love to tell you the registry by the way.. but for me they are blank... ~.~

Last edited by eRe4s3r; 13/04/14 04:47 PM.