hacked pc

If your PC was hacked and you had to reinstall Windows, you may wonder whether your Windows 7 product key still works after a free upgrade to Windows 10. In this forum thread, a user whose PC was hacked and infected with malware attempted a clean install of Windows 10 via USB but encountered issues, so they reverted to Windows 7 using their original CD. They ask whether the Windows 7 product key remains valid and whether they can later reinstall Windows 10. The discussion covers activation concerns after a malware incident and the upgrade path between Windows 7 and Windows 10.