I am using the latest CCleaner 2.03.532 on Vista. User account protection is on, my account is in the Administrators group, and CCleaner requests elevation to Administrator when starting.
When I run the Cleaner function, the C:\Users\(username)\AppData\Local\Temp\Low folder is deleted, which Internet Explorer uses for its protected mode operation.
When I attempt to print from Internet Explorer, an error dialog appears complaining that a file in the Low folder does not exist. Printing from Internet Explorer become impossible.
I found a work around at http://forum.piriform.com/index.php?showtopic=10059. First recreate the Low folder, and then run...
ICACLS C:\Users\(username)\AppData\Local\Temp\Low /setintegritylevel (OI)(CI)low
Printing will now restored.
In future versions, could you please refrain from removing the Low folder?