While a user tries to switch to Windows 10, they mistakenly perform a clean install instead of an upgrade. There are certain things that work slightly different for Windows 10 than for any other version of Windows. FIX 4: Reactivate Windows after a hardware change:įixes for Windows 10 Activation Error 0xc004f050 FIX 1: Upgrade to Windows 10, and then perform a clean install:.FIX 3: Use Windows 10 Activation troubleshooter:.FIX 1: Upgrade to Windows 10, and then perform a clean install:.Fixes for Windows 10 Activation Error 0xc004f050.