In Windows XP Pro or Vista, if you have a computer running multiple processors or one with a dual core processor, you can assign specific programs to use a specific processor or core. First you need to open the program or run the process. Then do the following:
- Right click an empty space on the taskbar or press CTRL+ATL+DEL and select to start Task Manager.
- Click the Processes tab.
- In the left column, find the process you want to assign (for example, Winword.exe for the Word program) and right click it.
- Click Set Affinity in the context menu. By default, both CPUs will be checked. Check only the CPU you want the process to run on (CPU0 or CPU1).
- Click OK.
This can be useful if you need to keep one processor free for use by a particular program, or if you're running older applications that don't work as well with two processors.