Solved: some files in temp folder cannot be erased

hi there i was deleting my temp folder,,, when i came across these files here,,,



they cannot be deleted,,, everytime i try to delete them this comes up,,,



what could be the problem and how can i delete this?
my computer is in italian coz im in italy,,, i translated the error message,,,

 

Those are index.dat files and can not be deleted when running the operating system. You can use CCleaner to delete the files when your system reboots.

 

thx for quick reply,,, i was a bit worried,,, thx for clearing that out for me,,,

 

You are very welcome.