Missing 50% of CPU Usage on Win2000
Posted on 2003-03-17
Configuration: Dell PC, Pentium 1.6GHz, 256 MB RAM...
OS: Windows 2000 with latest patches.
Applications installed: Vanilla PC: MSOffice, couple of tools. No servers, no databases. Networked for non-server functions.
Startup (known) applications: McAffee Virus Scan.
Situation: Right after the boot the CPU usage according to Task Manager Summary is 40-50%. The processes windows shows 99% of CPU with System Idle process, 1% with taskmgr.exe. Mcshield.exe grabs some CPU now and then for a moment.
Dilema: Who consumes 50% of CPU, which is not reported by process CPU usage breakdown? The PC has some actions slower than expected (closing spreadheets, page views generating). I do believe that the missing usage is for real.
- verified on "Identical Twin" machine. Summary CPU usage is 0-1% on the Twin.
- Checked startup folder to see that there are no applications registered there.
- Scanned the machine remotely with Retina - clean
- Scanned the machine with Adaware 6.0 and removed cookies/keys flagged.
- Used a few 3rd party task monitoring SW (e.g. Process Explorer by sysinternals.com) just to see the same: 50% of CPU usage is not broken down with a process. Surprisingly PE shows that Idle has 50% of CPU.
My action of last resort is to reformat/reload W2K...
Thanks for your help