Junk Files are temporary files created by Operating System and different applications for their own use. Although Windows is capable of removing them when they are not required, it doesn’t usually happen in actual fact. So we require specialized software applications to remove temporary files and private data such as document history, recycle bin, etc. You just cannot count or measure the amount of junk data that can be existent at various locations in your system, which in effect makes their handling cumbersome. Junk or temporary files are also a kind of burden on your PC; the lesser the better. Junk data/files unnecessarily occupy your disk space thereby creating logjam for other files/data to be stored in your hard disk; their existence can also endanger your private information. PC Optimizer Pro cleans the following kinds of junk data for you.