Even if by some miracle the executable isn't malicious, the "keys" it provides are always previously used, blocked, or invalid. You will enter 20 different keys, watch them all fail, and then be prompted to "upgrade to the paid version" of the keygen—which is just a credit card scam.
This is a gamble. Many eBay keys are MSDN (Microsoft Developer Network) keys that expire after 90 days, or they are volume license keys that can be mass-revoked. You might get lucky, but you might lose your activation after a Windows update. windows 10 home product key generator
Many fake key generators are actually information stealers. When you run the .exe file, it scans your browser for saved passwords, cookies, and credit card information. Within hours, your email, social media, and banking accounts could be compromised. Even if by some miracle the executable isn't
While Microsoft rarely sues an individual for using a stolen key, the act of generating or distributing keys violates the Digital Millennium Copyright Act (DMCA) and software piracy laws. If you are using a keygen on a work computer, your employer faces fines up to $150,000 per infringement. Many eBay keys are MSDN (Microsoft Developer Network)
: A popular free app available on the Microsoft Store that displays your installed key and original OEM key. 3. Official Generic Keys (For Installation Only)