twistedone

i used CCleaner last night on a windows 2000 computer. when i used tools i ran the regular programs , then issues. well i clicked fix all issues and when the computer was restarted windows 2000 did not come up :-( i restarted the computer in safe mode and the OS did load however the keyboard would not work. when it asked about a backup registry i foolishly clicked no . is there anything i can do to fix the problem when i go back to work tonight .. ?????