crashhat69 - if you can be 100% sure , that excluding yourself , then anyone with access to your PC , doesn't really have a clue about them , then no need to do secure deletion of the cache . However if any of those with possible access , is anywhere near really knowing their stuff , secure deletion of the cache , is virtually essential .
I finally found that if I didn't use the desktop or taskbar shortcuts and ran it directly from c:\Program Files\CCleaner\CCleaner64 the program runs fine.
So I'm assuming the short cut options (add shortcut to...etc) when downloading is the problem.
Recently there was a change to CCleaner that reduced UAC aggravation.
"Run As Administrator" is sort of related to overcoming UAC.
Is it possible that recently enhanced Secure Deletion gets a speed benefit with reduced UAC aggravation when running CCleaner direct,
but a Desktop/Taskbar/etc launch has reduced privilege and so runs slow ?