So your first thread gets locked and you make a new one?
By your own admission you illegally pirated a copy of Photoshop CS4 and now want to cover your own a$$ and run a virus check. Your breaking forum rules for the second time in 30 minutes.
In case you forgot about the info in the first thread, all sorts of nasty stuff gets installed on your pc from pirated software. A scan will find most of the nasties, but not all of them. Not to mention you would be at risk for a plethora of security vulnerabilities and zero support from Adobe (obviously) how many more threas are you going to locked on this topic?