I purchased SpeedScan and after I installed it, my system was actually slower. There reply was I need to buy there other sotware's to clean entire system. After spending almost $50 on the first one that did not do what it claimed, I decided to cut my losses and opt out. I emailed for a refund, I received no reply. I tried to uninstall what I had and ran into more problems trying to get it off my system.<br /> After much frustration, my system crashing daily, everything getting slower and slower by the hour. My only option I could find was, I reformatted my entire hard drive and started over. My system is now running fine. read full review »