You need to find the specific system process or processes that's taking all
(there are lot of sub-processes tied to the 'System' process) the CPU
resources and slowing down your PC.
To do this try Process Explorer:
http://www.microsoft.com/technet/sysinternals/SystemInformation/ProcessExplorer.mspx
Once you have Process Explorer installed and running:
In the taskbar select View and check 'Show Process Tree' and 'Show Lower
Pane' options.
(This will provide the detailed info you need)
Next click on the CPU column to sort processes by %CPU usage.
Then click on and expand the 'System' process and identify the sub-process
that's using most or all the CPU %.
Click on and Highlight the sub-process of interest, right click and from the
options listed select: google, This should display what out there on the web
about that process.
Note: some entries like Explorer, System process and svchost may need to be
expanded to show the detail, (sub processes), in this case click on the +
located to the left on the entry.
Also keep in mind that one or move of these processes may be associated with
your AV software.
Their are also Services that run on startup and some of these may not be
necessary:
You may be able to eliminate some unnecessary services
Services Startup Type Descriptions:
Disabled - This service will never start.
Manual - May be started when needed by an application or another service.
Automatic - Started when Windows boots.
For more info on what service are needed or can be stopped see:
http://www.beemerworld.com/tips/servicesxp.htm
JS