CCleaner is a utility software deployed to clean undesirable files (such as temporary internet files, where malicious code tends to hide) from a computer. CCleaner also serves as a registry cleaner to delete idle entries and fix errors that can gear down your PC, as well as a protected file shredder for destroying sensitive information. CCleaner often identifies and erases a few gigabytes of crap (“C” in the CCleaner) for a noticeable increase in performance, while protecting your privacy in the process.
Don't fret, CCleaner steers clear of essential system files, and bypasses cookies that look like your login info, to spare you the effort of typing your passwords and logins all over again. It also informs you exactly what it intends to erase before it actually starts, so you always have the final word.
Thus, CCleaner can clean the following:
- Browser: cookies, history, temporary internet files, download history, form history
- super cookies, etc.
- Registry: file extensions, out-of-use registry entries, progIDs, ActiveX controls, ClassIDs, shared DLLs, uninstallers, etc.
- Windows: Recycle Bin, log files, DNS cache, temporary files, error reporting, etc.
- Third party applications: Microsoft Office, Windows Media Player, Google Toolbar, Adobe Acrobat, WinRAR, etc.