Junk files are created by almost all of the Windows applications you use. In an ideal case, such files are deleted by the program that created them in the first place. But, the converse is what happens often. These files can have a temporary existence where the parent program, which created the file, would delete them upon exiting, or a permanent existence due to unexpected termination of the parent program, an error in the program, a system crash, etc.
The point to be noted here is that such files left behind will reside in your hard disk and accumulate over time unless you manually find and remove them. Some of the results of having a substantial amount of such junk files are dramatic reduction in system performance, consumption of hard disk space (sometimes up to hundreds of megabytes), system crashes etc.
This utility helps you clean unwanted temporary and obsolete files from your disks and regains disk space. You will be left with a cleaner drive.
Safe: Disk Cleaner uses a built-in 'ignore list', and will exclude many important files from being deleted. You can also add your own file types to the ignore list easily, and they will be excluded from the cleaning process.
The reason why each file is not needed will be shown by the cleaner unlike other disk cleaners that blindly clean files.
From the list of files, advanced users can open/explore any file and confirm whether the file is a junk one or not.
Optionally cleans 'zero length' files, temporary internet files, etc.
Allows important folders you wish to be excluded from scanning altogether.
Can use wild cards.
Option to delete files to the recycle bin, permanently delete or backup to a folder of your choice.
Fast - don't waste too much time; powerful - can be customized to find your own junk file types.