I made the bonehead mistake of installing a trial version from a window that popped up on my PC. Installed it and naturally it can't do much. Identifies a lot of problems but need to pay for full-version to take care of it. Plus it installed some type of spyware (webrebates.exe)that I haven't been able to completely rip off my PC. Still getting pop-ups frequently since this was installed. If you get a pop-up for a free registry cleaner DO NOT TRY IT!