A computer technician once recommended CCleaner and so I downloaded it and have used it on my computers for a few years now. I've been very happy with the results and it is simple to use. CCleaner is available to download online as a free edition and it installs quickly and easily. The software helps clean up my computer files, fixes errors, gets rid of traces of deleted files, deletes cookies, etc. As a result of this cleaning, my computers run faster because they aren't bogged down with unwanted stuff that collects from the internet and other programs. It is always amazing to see how much collects on my computer when I haven't cleaned it regularly. So, I try to run CCleaner about every month or so. CCleaner is able to delete files, scan for issues with the registry and repair them, uninstall programs, wipe the drive, and more. It only takes one or two clicks to scan, clean, and fix things, and it does it all within seconds! I only operate the cleaner and registry myself, because they are simple and safe. But, if you know what you're doing and need to do more specialized cleaning, it lets you. I highly recommend CCleaner.