Hi
When I turn my other computer on it doesn't load anything, I just get a message SAYING 'System Operator not found'

Does anyone know why this has started to happen as it was fine last night? The computer does not have access to the INTERNET so it could't b e a bug.

It used to have windows 98 but recently had xp put on.

Thanks
Do you mean operating system not found?

If YES; Has this happened after installing Windows XP?

Yes thats the one!
I had xp put on about 6 months ago by a friend but recently had a new computer and stopped using the old one. Have now decided to put old one in another room and when I checked to see it was still working last night it was fine, then when I tried tom use it this morning, it came up with that message!What actions have you taken before you shut down the computer and turned it on the next morning?I put it on standby last night then pressed the button on the FRONT of the machine to wake it up and nothing was happening just a blank screen so I ctrl + ALT + del and restarted and it starts to load then comes up with the message operating system not found.
I have got a reboot disk but it will clear all the data I have saved on there and will put and earlier version of windows on (98 I think). Is this the only solution?What kind of reboot disk?

I advise you to power down your computer rather than keeping it on stand-by.