Once that step of the process is complete, the file is no longer needed and turns into computer junk.

But that file is needed to install, run, or execute your request only at that very moment. Nearly anything you do on your computer requires your system to create a temporary file. That's why it's a good idea to delete junk files regularly.Īn excess of junk files is one of several reasons why your PC gets slower over time or why you might suffer 100% disk usage in Windows 10. Thankfully, they’re not the same as bloatware or a computer virus, but they might slow down your device and impact performance if ignored for too long.

Having junk files on your computer or phone isn't your fault.