Basically, I've been performing way too many large-scale disk operations (installations, uninstallations, etc...) in the past week or so. Things like installing/uninstalling PC games, software over 1-2GB each, etc...
Now my disk not only is extremely full but it's having "serious errors." The thing is, I cannot reformat so I'm just looking for the best disk cleaning software. In other words, a hard drive toolkit that won't make matters worse. Thanks for your help.