Hello
Error 0x8004f807 is an error text that appears when running "slui.exe 0x2a 0x8004f807" on computers running non-core versions of Microsoft Windows. To fix this issue, you can try running System File Checker by opening Command Prompt as Administrator and typing "sfc /scannow" without quotes. Once all files are repaired, restart your PC and run Activation Troubleshooter again.