windows displays "safe to turn off computer" after bootup.

computer boots fine except that when it has finished loading instead of displaying the login screen it displays the "now safe to turn off your computer" screen. numlock light behaves as normal and ctrl+alt+delete restarts machine. holding escape produces orange dots on the screen and locks the machine so that numlock stays on and ctrl+alt+delete does nothing.
machine crashed and froze while loading an application. it is possible (though not probable) that this app was writing to the registry at the time. before loading the app the machine was left connected to the internet unattendted because the monitor was being used on another machine. during this time the machine was acting as a server and behaving normally.

no bios settings have been changed recently.
can boot normally into dos and all files seem ok.

is it worth booting in safe mode and running a virus scan etc.

machine is running windows 98se.
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SnowguyConnect With a Mentor Commented:
Boot to command prompt or with a boot floppy.
At the prompt type scanreg /restore choose a time when the pc last booted.
ico2Author Commented:
it works thanks so much.

and i can think of so many times that could have saved me formatting and reinstalling my os in the past.

thanks again
You are welcome glad your up and running again.
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