Well the same thing happens to me, only worse. I try to use photoshop and it lags so friggin' much, and it makes all my other programs laggy. I don't have any viruses. I can't even use photoshop anymore! I only had it for 4 days!! And when I try to use any of the brushes, the brush sizes aren't even half of normal, even when I turned the size up to maximum. I only downloaded like 8 brush sets. Someone please help!
Task manager, And shut down everything in Username only, BUT Exployer.exe & Taskmangr.exe, Leave System and Local Service ALONE!