The Blue Screen of Death signals a major problem with the computer, usually involving video or hard disk problems. Make a note of the message that you see on the screen. This is often useful when trying to solve the problem. Other problems that you may encounter are invalid page fault messages that will close the open program, possibly causing a loss of unsaved data. Save your data frequently. In either case, rebooting your computer will usually solve the problem temporarily. If it happens often, investigate the problem and solve it by reloading the corrupt files named in the message. Sometimes adding memory to the system will solve the invalid page fault messages. Check the web site for the company that made the program to see if they have a patch or fix for the program that you can download onto your computer.