Press the Ctrl+Alt+Del keys and then select the Processes tab. Look for a
high CPU usage process.
What to know more then the basics then use Process Explorer to find the
specific process or application that's taking all
the CPU resources and slowing down your PC.
To do this try Process Explorer:
http://www.sysinternals.com/Utilities/ProcessExplorer.html
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 the process that's using most or all the CPU %,
once it's highlighted, 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 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.
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