CCleaner not responding

when i try to clean the registry it fixes most issues but always freezes when it comes to the items below:

invalid reference>imagepath-system32\mutex-threads.exe>hklm\system\currentcontrolset\services\.net crypt

invalid reference>imagepath-system32\idle-threads.exe>hklm\system\currentcontrolset\services\.net main

invalid reference>imagepath-system32\latch-threads.exe>hklm\system\currentcontrolset\services\.net security

invalid reference>imagepath-system32\semaphore-threads.exe>hklm\system\currentcontrolset\services\.net semaphore

what can i do to fix this?

please read my signature. You can right click those entries and add them the excludes