Recently one of our customer’s computers locked up which can be quite alarming. If this happens, the first step would be to make sure the power cord is completely plugged in to the computer and there are no visible signs of damage to the cord. The cord may come slightly loose from time to time. If after doing this step there still isn’t anything displayed on your computer screen, you can hold the power key down on the CPU for 8-10 seconds. This is called a hard reboot. It’s not a very good idea and should only be done as a last resort. Windows is pretty good at recovering from an issue of this sort. We recommend a computer reboot once a week. You will see a better computer performance. Other options you have is to simply replace the computer or throw it out the window and we don’t recommend the latter of those two. :-)
If you do continue to have issues and your equipment is quite dated, you should consider an upgrade. If your equipment is still within warranty, contact the manufacturer.