For basic computer users, a locked up computer can seem like a major crisis. But, in order to save yourself some money and time, you should first take a deep breath and then follow the primary rule of computer troubleshooting: Reboot!
Simply close all your open files if possible. If you can't close them, your software has likely automatically saved at some point, so you won't lose all your work. After closing the files, go to the start menu and click the Restart button.
If your computer is locked up, you may have to use the power button. We try to avoid this, but sometimes it just can't be helped. If you have to turn your computer all the way off, give it about thirty seconds before you turn it back on.
If you reboot and you continue to have major problems, then you should go ahead and call your IT consulting firm. To learn more about computer troubleshooting, read the full article (link above).
Blogged by Computer Consulting Kit