I purchased Advanced PC Tweaker to solve a tough Windows 7 problem (unable to update Windows). The software had been mentioned favorably on a Microsoft site. Unfortunately, the software deleted files needed for Windows 7 to restart successfully, and the restore points were deleted, so I had to spend many hours recovering my system & reinstalling all software. When I complained to the APT staff and asked for a refund, I was given a generic response and they couldn't understand why I might be unwilling to jeapordize my system by reinstalling it again. I DO NOT recommend this software.