What the equivalent of Disc Utilities ( Mac) on PC My friends PC seems to have bogged down and I'm sure she hasn't "cleaned it up" since she bought it. On my Mac I use "Disc utilities...repair the authorisations" then reboot. What do I have to do with a PC to get it running smoothly again...Please keep it simple.... have all ready asked this question on a PC site.... and got back "Defragmentation".. "download a special program"...ECT. Jesus !!! I know why i love Mac.