I have an old e machine running XP, and last week I was playing a game on facebook and it kept flashing up saying virtual memory too low and was being increased. Most of my system is free space, so I didn't understand. After a few days of this, my computer or monitor won't come on. On initial power up, the moniter says going into power save mode and won't do any more. Is my hard drive gone, or something else? Don't know what to do do to get the screen to come up. I like to keep my old system working for the grand kids to play games on. I have an old Hard drive out of another XP Dell that I haven't destroyed yet that was working, just the rest of the system died. Will that work to replace this one. No problem tossing this one, but I just like to tinker. Just bought a new computer with windows 7 OS.Replaced the battery, no luck. Thanks for any ideas.