so my computer was running slow so i put in the recovery disk and it made a new profile for me but the old one is still on there with the virus and now my computer runs really really slow? how do i clean off the old users with the viruses on it ?

Windows Vista black screen with movable cursor after welcome screen.

I've tried to solve it using recovery disk, unplug any connected cables, RAM, CMOS … cheked every thing but there is no change. Please i don't want to format my hard drive b/c i have important files on it.

Please help me figure out how to fix this! Thanks!