My Computer was working OK this morning.

I shut it down and after an hour or so turned it back on.

It went through the usual start up process getting to the windows welcome screen (before the accounts screen).

It stayed on this screen for a couple of seconds, then all by it's self it rebooted.

No keys were touched.& the mouse wasn't used.

It has did this several times.

I turned it off, opened the case and checked all the connections were good, then turned it on again, same thing.

I tried once more but this time I got no display on the monitor.

I've tried several more times, same result!

I've rechecked all connections are good.

Anybody any ideas where I go next?

Answer:
When you say no display, do you mean none at all? Or do you get the Bios POST (Power On Self Test) that, amongst other things, lists the installed drives?

If you get the POST screen, then try booting into safe mode by tapping the F8 key and choosing safe mode from the options. If you can get into safe mode, then your issue is with a driver and there are things that you can do to identify which one.

If you can’t get into safe mode, then press the F8 key again and this time select ‘disable automatic restart on failure’ or something like this. You should then see a blue screen when the boot fails. At the top will be an error code. Make a note of this code. At the bottom will be a STOP: error. Note that and post them here. I’ll check back from time to time to see if there’s anything new and try to advise.

Answer:
If you're not getting a display now you'll have to get a cheap hard drive that won't matter if it gets infected. Install this and remove the old one. Then insert the Windows Installation Disc and boot from it. If it works, hen buy a proper hard drive, and install Windows onto it. Open the old drive slightly and make sure you don't lose any of it. Then pour petrol or pure alcohol into it. Set up a fuse of petrol along the ground on some tarmac somewhere away from people, and set fire to the fuse. Now stand back. It should at least melt, or hopefully blow up. That means no one can access your private data or get the virus. Start afresh.
Answer:
Sounds like the processor is overheating.

Go into BIOS and see if there’s an option there to monitor the CPU temperature. If it's over 50-60, it's too high.

PS. It does NOT have a virus. Ignore the other posters. A virus will not stop your PC from getting up to BIOS.

Answer:
sounds like u have a virus… u might have to format to get this rectified x hope this helpsx
Answer:
it has a virus