Microsoft’s Windows 10 activation servers will accept Windows 7 and Windows 8.1 keys on your PC. However, if you’re upgrading from Windows 7 and can’t find the key, you can try signing in to ...

Older versions like Windows 8.1 and Windows XP continue to linger with minimal market shares of 0.31 percent and 0.28 percent, respectively. In the overall operating system market, which includes ...