Installed the Windows 8 Pro x64 and tried to reinstall CCleaner

Hi,
I recently installed the Windows 8 Pro x64 and tried to reinstall CCleaner but the Skip UAC option gave me the warning message. What did wrong with the program? How can I solve this matter? Any help would be really appreciated. Thanks.

CCleaner
The task XML contains a value which is correctly formatted or out of
range.
OK
