If Windows suddenly freezes.

Try this:

1. Press "CTRL" "ALT" "DELETE"
2. Task Manager Appears
3. Click The "Processes" Tab
4. Find any and all instances of "Explorer.exe" and close them all by right-clicking and choosing "End Process"
5. If you've done this successfully your taskbar will disappear - don't worry - that's what you want.
6. Now, while you're still in Task Manager, click "File" "New task" and type in "explorer.exe" (without the quotes)
7. Your taskbar should now reappear and your computer that was frozen should now be ready to go

This trick will work most of the time - but not always. Sometimes you cannot even use your CTRL - ALT -DELETE keys. If this happens you'll just have to shut down, and restart