The "PCA" causes me some headaches. Sometimes when i try to install a program it says something like "This program was not installed correctly" and offers me to reinstall with compatibility settings or just select "This program was installed correctly". I disabled PCA via gpedit.msc, but I'm not sure if it won't mess something in the registry, when i install my programs "forcibly". Is that a real issue or can i just leave it disabled? Programs which caused this: - PS3 Media Server (uses java) - patch for Assassin's Creed (that's weird) - and for the first time Flash Player, but when i reinstalled it was ok