Anne- I am not familiar with Toshiba model designations but I think the Satellite is a laptop, if not please disregard the following. You didn't say whether you were operating on the battery or ac adapter when this occurred. In addition to what Tom suggests I suggest the following. If this occurs when operating on battery it may be your battery is loosing its charge capacity. As a battery ages it loses it's ability to supply it's rated current capacity. Many current electronic devices have circuitry that automatically shuts the device down when the battery discharges to the point it cannot supply enough energy to properly operate the device. If this occurs while operating on an ac adapter it may be a problem with the power supply. Ac adapters have filter capacitors in them that over time dry out which reduces the dc output and causes more ac ripple (less DC) in the output. Many laptops are very sensitive to ac ripple in their power source. If this problem occurs in both modes, AC and Battery, you probably have other problems that a Tech would have to address. If you have them available you might try substituting a different battery or ac adapter. HTH John Dinges The NOSPIN Group Promotions is now offering our special coffee mugs and mouse pads with the PCBUILD logo... at a great price!!! http://freepctech.com/goodies/promotions.shtml