I have ccleaner-never had to pay for it. Those other sites that tell you all the problems you have, are scams. If you look closely, it will say FREE SCAN. Thats all it is . a scan and then you have to pay to get the program to take out the 1000's of problems it says you have,. stay away from them!!! you usually end up with more problems. I use AVG, best and no problems.