Windows XP has a feature called ‘Fast User Switching’, that allows other users of a machine to log on without you logging off. This is great for machines with lots of memory, but if your memory is scarce you’ll probably benefit from disabling this feature.
To disable it:
- Go to Start, and click Control Panel.
- Go to User Accounts.
- Click ‘Change the way users log on and off’
- UNCHECK ’Use Fast User Switching’
Simple, right?