b. Windows 2000- Hold down the Ctrl and Alt keys on your keyboard at the same time, and press the Delete key once.
- Click on the Task Manager button to launch the Windows Task Manager.
- Follow these steps to close unnecessary programs:
To Close Applications- Click on the Applications tab to view the list of active programs.
- Click on any program listed in this window and select the End Task button.
- Repeat the previous instructions until all programs have been closed.
To End Processes- Click on the Processes tab to view the list of active processes.
- Click on any program listed in this window, other than those listed directly below, and press the End Process button.[list:cdc179e82f]
- Csrss.exe
- Explorer.exe
- Internat.exe
- Lsass.exe
- Mstask.exe
- Smss.exe
- Spoolsv.exe
- Svchost.exe
- Services.exe
- System
- System Idle Process
- Taskmgr.exe
- Winlogon.exe
- Winmgmt.exe
[*]Repeat the previous instructions until all unnecessary processes have been closed.[/list

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That's it. Don't forget that any background applications or processes that you shut down will be unavailable to you, but they will return to normal the next time you reboot.