Computer gone into overdrive

[David]

My computer seems to have gone into overdrive.

CPU usage 100% constantly, Task Manager/Processes says mainly System.

Computer will not shut down on its own.

Tried scanning with AVG Virus Checker but that runs very very slowly, other
progammes slow and hang up regularly.

I did use Reg Cleaner to stop some programmes loading at start up a few days
ago, there was no immediate deterioration after that. I had to reload some
elements because programmes would not run. I have subsequently run a system
restore to a point prior to removing some of the start up programmes, and
intsalled SP3 all to no benefit.

Does anyone have any ideas please?

 

[Malke]

My computer seems to have gone into overdrive.

CPU usage 100% constantly, Task Manager/Processes says mainly System.

Computer will not shut down on its own.

Tried scanning with AVG Virus Checker but that runs very very slowly,
other progammes slow and hang up regularly.

I did use Reg Cleaner to stop some programmes loading at start up a few
days ago, there was no immediate deterioration after that. I had to reload
some elements because programmes would not run. I have subsequently run a
system restore to a point prior to removing some of the start up
programmes, and intsalled SP3 all to no benefit.

Reg Cleaner may have ruined your Windows install. See this thread about
registry cleaners for why they are Bad:

http://aumha.net/viewtopic.php?t=28099

A scan with AVG isn't going to be thorough enough. Go through these general
malware removal steps systematically -
http://www.elephantboycomputers.com/page2.html#Removing_Malware

If the computer is truly virus/malware-free, do clean-boot troubleshooting
to track down the culprit.

Clean boot in Windows XP - http://support.microsoft.com/kb/310353
Clean-boot advanced troubleshooting in Windows XP -
http://support.microsoft.com/kb/316434
How to Troubleshoot By Using the Msconfig Utility in Windows XP -
http://support.microsoft.com/?id=310560


Malke