[iFriSki]

You don't need registry files to install SA:MP. The registry keys pretty much contain the installation directory, the executable, uninstall, and sometimes other things.

I just went and reinstalled it to see the problem. Go to the root directory of your GTA:SA installation folder.

C:\Program Files\Rockstar Games\GTA San Andreas

If this doesn't work a picture would be nice.

Quote:

I am running on Windows 7 64-bit,

Something I overlooked the first time. Try and right click -> run as administrator if the other method fails.