I downloaded CCleaner today to clean some junk off my computer. I did a registry clean and and saved a backup reg file. I relised afterwards that a large number of my programs stopped working and " Program not found" messages popped up. When i try to restore them with my backup reg file called (cc_20061229_2032) an error pops up saying "The application failed to initialize properly (0xc0000005). Click OK to terminate the application." I’ve tried the reg file over and over but it still wont work.I am an administrator of the computer but not the owner. Can anyone tell me how to restore my programs. My microsoft offic 2000 Pro was removed and i dont have the CD. Please tell me what i can do!
I’ve tried to do a system restore already and it said that it couldnt be completed because nothing had been changed. And The office icons ( ie. Microsoft Word) are still there and when i click them they ask for the cd.

My PC takes what seems to be for ever to upload programs i.e. microsoft word. It runs extremly slow compared to my notebook. Although I do not have a large amount of memory I feel that I that I may have a lot of things running that take up memory room that I do not use. Is there a software that helps clean up and tweek a system?