Ccleaner - To clear the cookies after I finish browsing , and to empty recycle bin files that I missed. (I am too lazy).
Glary utils- I use it very rarely to find registry errors.
TU 2009- Just to speed up my PC by following some of the recommendations like turning off unnecessary services,etc.
PS: For those who didnt know about Anvir task manager, it can be used to delete obsolete/invalid service entries that you may find under services.msc panel. Displays all active processes/services, can be use to analyze memory consuming processes, even displays hidden ones. Can prevent unauthorized auto-start entries.
Grr, you havent told us about the security setup on your PC