I guess it kind of related to USB devices. I just lost standby option recently. The standby button is dark and not functional in one day. Restarting didn't solve the problem. The only thing I think that may be wrong before I found this is that I was trying to disconnect a flash drive, and the windows told me it couldn't be disconnected, I lost my patience and plug it regardless of this messenge.
My wife's computer also lost standby some day with unknown reasons. She didn't know much of the computers and she didn't play with devices and configurations either. The only devices are USB devices like MP3, camera....., so, I suppose it is the same USB port reason that she lost standby. But I have no idea how to fix it.
Any help? Or if there is some way just reinstall some system files without loosing the program files in WinXP? I remember when I Win98 has the problem, I will simply reinstall it by overwrite the old one, and most time the problem is fixed and I didn't loose my program files. But I don't know how to do it in XP.
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