open a command prompt and enter this
%windir%\system32\msiexec.exe /unregister press enter
%windir%\system32\msiexec.exe /regserver press enter
%windir%\syswow64\msiexec.exe /unregister press enter
%windir%\syswow64\msiexec.exe /regserver press enter
exit press enter
then reboot the pc
edit--where it says press enter it means press the enter key dont type in press enter