It is often useful to have a Trashcan or Dustbin where you can dump unwanted files.

The ancillary benefit of a clean install is that it creates an incentive to weed out unwanted files, improving system performance.

Anti-virus software and a firewall can protect you from inadvertently accepting such unwanted files.

What virus scanner should I use to find and delete the unwanted files?

The unwanted big files can be more noticeable.

Disk storage, such as your hard drive, fills up with unwanted files over time.

Disk cleaners are computer programs that find and delete potentially unnecessary or potentially unwanted files from a computer.

The browser is extremely fast and when it makes thumbnails, it makes them on the fly leaving no unwanted files on the hard disk.

When they had all left, the Adjutant removed the unwanted files and the Captain sat back in his chair, musing.

Trash (computing), a way in which operating systems dispose of unwanted files.