i have tried Ccleaner and a few other free downloads and once they run the scan they say I need to buy the real version because I have to many files found to be cleaned up. I need to make sure I don't get rid of anything important that is installed on my computer.

I ahve run scans from free downloads but they won't clean the errors unless I buy the software. There are free software programs for everything else, how about this

I was just wondering where I could find free downloads of registry
cleaners and adult site cleaners that are not trial versions but that have full features