On a Windows Vista service pack 2 machine.
I successfully installed Photoshop CS6 upgrade on my computer and it was up and running. Two days later I was hit with the FBI moeypack virus and had to do a system restore and then ran Mallwarebytes to get rid of it. The system restore point was just before I installed CS6 and after the restore, CS6 was gone. I tried to reinstall CS6 and now the installer fails. I ran Adobe Support Advisor and it shows no problems. I ran Adobe creative suite cleaner tool chosing CS6 and it didn't help. Photoshop CS5 is still on my computer and it still runs OK. I am at a loss as to what to try next.