Free Windows keys from the internet: why they do not work

Lists of “free keys” attract millions of searches. Here is what they really are.

Four kinds of keys in those lists

• Generic install keys that install but do not activate.
• KMS client keys that need a corporate server.
• Leaked keys already blocked.
• Fake keys with nothing behind them.

Errors they cause

0xC004F074, 0xC004C003 and 0xC004F050. See what the codes mean.

Why it is also risky

Sites with such lists often push activators and fake downloads.

Legal ways not to pay

Reinstalling on a PC that already has a licence, or using Windows unactivated with limits.

If you have no licence

Buying a key is the simple fix.