Ok, I think we can try something.
Open a CMD prompt ( Start -> cmd.exe ) , then type :
for %x in (c:\windows\system32\*.dll) do regsvr32 %x /s
Press [Enter] , wait until it's finished then try running the current AdwCleaner version ( this one : https://toolslib.net/downloads/viewdownload/1-adwcleaner/ )
Do you have the error message?
Regards,
Xplode.