When cleaning with multiple passes, CCleaner picks a certain file, then Windows will hang. It will display that it is deleting the file, when I click 'Cancel' or try to close CCleaner, it will stop responding, and the two choices I'm left with are force shutdown / reboot. I've not tried cleaning without multiple passes. At first, I thought this issue would only occur when attempting to delete compressed file folders in the Recycle Bin. Then I tried to clean Internet Explorer, Windows Explorer, and System (w/o Recycle Bin) and Windows hung again.
I have tried disabling Windows services in msconfig besides security.
This issue only began when I installed Bitdefender Internet Security 2013. When using Bitdefenders File Shredding tool (A program that deletes select files with a single pass) it would also fail to delete the files CCleaner did, but it wouldn't hang Windows.