i thought this piece of software was very good. Until i done a scan for junk files. It went into my system files and deleted important files, which resulted in windows getting many memory errors. I was forced to wipe my computer and start again because of this program. I suggest you stay away as you may have the same problem. Some features on it also dont work. There is an 'reinstall internet explorer' feature. That is useless as it doesnt do anything. Best part about this program is the ablity to back up your windows activation. But overall, DO NOT DOWNLOAD THIS unless u want many computer problems!!!