How to remove junk files from my computer?

There are few windows utilities available. But I'd suggest a free Disk cleaner, which is free and effective.
Usually junk files appear as a result of program's incomplete uninstalls, or Temporary Internet Files. At some point, these files use a considerable amount of space on your drives.

Wise Disk Cleaner, with its intuitive and easy to use interface, helps you quickly wipe out all the junk files. Using the program is indeed easy. It also works fast when both scanning for files and deleting files.

Click here to download Wise Disk Cleaner