CleanerPlay9

I installed C Cleaner on a reconditoned Windows 2000 system. All seemed to be working well. I am not sure if I turned the computer off and on to test. But a few days later system will not operate and gives root system 32 error. I do not have the operating CD. Do you think I deleted the operating temp files by mistake. Can CCleaner help me restore those files and how? I believe I saved the CCleaner onto a disc before I shut down the computer.