Some users reported more serious issues. In one 2026 forum thread, a user described: "Then I tried Hal7600, which gave me similar results. I finally tried Winloader extreme, which worked, but screwed up a few of my drivers, which I reinstalled. I later found out that the first hack gave me a virus which was the cause of the BSOD error message".
: It modifies core operating system files to trick Windows into believing it is permanently activated. HAL7600 v1.2 Win7 Activator
For users who need to activate Windows 7 legitimately, consider these options: Some users reported more serious issues