Never seen this before, something in your install is corrupted. Try this:
Follow the clean install instruction on the documentation FAQ installation page. (follow the exact same order)
Now Open the registry -> Run -> regedit
Navigate to:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
Look for MCEBuddy Key and delete the entire Key.
Now it's a clean uninstall and try to install it now.
Follow the clean install instruction on the documentation FAQ installation page. (follow the exact same order)
Now Open the registry -> Run -> regedit
Navigate to:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
Look for MCEBuddy Key and delete the entire Key.
Now it's a clean uninstall and try to install it now.