Strange CPU Usage problem

[PCBliss]

Im working on a Dell Dimension 2200 with a celeron 1.3ghz... The computer is very very slow and takes about 7 minutes just to get to the desktop. There isnt any spyware on it, and even in safe mode with the task manager open, the CPU utlization is maxed at 100%, with about 70% alone devoted just to running the task manager... OBviously this shouldnt the case.... any ideas as to why this would happen?
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[firewall]

Type msconfig in the run dialog(in the start menu). See which services and apps are loading on startup and look for any suspicious apps/services which are loading at startup.

Does it takes longer to boot as compared to previous boot times (getting to the welcome screen)?

Did you install any new software/hardware on/in your PC?

 

[firewall]

Which utility did you use to check for the spyware? Do you have Av/Firewall installed?