Go to Settings > System > Storage. Turn on "Storage Sense." It will automatically delete temporary files and recycle bin items every day. This is essentially a free, automated PC cleaner.

Common places people look for these keys include:

Unauthorized copies typically cannot receive critical security patches, leaving your system vulnerable to new threats.

The demand is understandable. The free versions of most PC cleaners are deliberately limited. They will scan your computer, find 3,000 "critical errors," and then stop. To actually fix the issues, you need a license key. This "bait and switch" marketing frustrates users, driving them to seek illicit free keys.