I am having problems with CCleaner and Outlook on my computer. When I run CCleaner and restart, OutLook brings up an error of Outlook was closed improperly and there will be some problems with it while it is processing. It is also slowing my computer to almost a halt after the cleaning and a restart. I really need your help on what's going on.

Office version and OS? Aside from cleaning Office are you cleaning Prefetch files?