I saw it clean some registry.It's a good program to clean registry ? because sometimes i feel abit slow loading where when i start my pc.Window XP logo loading bar load more than 15 times to go into the window screen and i still need to wait for program to load inorder to use my pc.
Around 10 to 13 min to start my window.

format means delete all the programs , everyone knows it's the best way.
I mean besides that , i don't like people always saying format the best way.