PC Keeps Re-Booting!!! - Page 2

guru · 22nd July 2013, 15:16

High CPU usage could either be because the system has slowed the clock speed right down to try to deal with an overheating event or you have malware which is busily joining it's friends is a DDOS attack somewhere in the world. Try downloading and burning a live Linux CD, boot off of that and see if the machine reboots or is OK. If it still reboots it does sound like a mainboard issue (maybe heat?) if it's fine then it's probably software.

jubbarelly · 22nd July 2013, 15:18

You need to see what application is running the cpu at that %.

Plus the PC maybe BSODing without you realising so when you first turn the PC on keep tapping F8 then scroll down to:

Disable automatic restart on system failure.

If it is BSODing then the PC will stay on the BSOD screen (blue screen of death)

In there there will be a 0X000XXX code which will relate to what's happening, just Google that and it should shed some light.

Moodster020 · 22nd July 2013, 16:48

I had this at one point.

It turned out to be.... The Power supply unit!

What had happened was, there was a build up of dust inside the unit eventually leading to a sort of a flashover, so it couldn't provide enough power for it to run, so the PC just shut down or rebooted.

Got a new one & it worked super. That was 10 years ago mind!

HTH

MangoMan · 22nd July 2013, 19:30

Thanks again for all the advice... Have the PC currently not online, plus I ran a good malware, Malwarebyte Anti-malware - all clear.
Changed the Power Supply Unit in case it was that..
Will try the Ram swap tomorrow.
I do have a friend who's a bit of a fundhi but he's away at the mo...

Thanks all again.

I will say it seems better today, sometimes running for an hour or more! But the 100% CPU worries me...?
And it doesn't get hot... Hardly warm to the touch...???

HarryM1BYT · 22nd July 2013, 21:29

Quote:

Originally Posted by MangoMan

Done a few more checks..
I'm not overclocking or modified it in any way. Everything was fine. Until now. It doesn't seem to be overheating and all the fans ate working fine. Opened it up and cleaned the heatsink and did a good dusting. Made sure everything was nice and secure and even changed the power supply as I had. Spare which I knew was good.
But it's still doing it but I have just noticed that on my Performance the CPU is running at 96-98% even at Idle!!! Ram at 60-70%. It used to tun at about 2-5% before...????
This cannot be right.... Any ideas?

Thanks.

Pressing Ctrl + Alt + Del should bring up Task Manager, if you then click the Processes tab. If you then look down the CPU column, it will show which process is using al of that CPU time. It is normal for System Idle Process to be using a large amount of the CPU time, it is the process which does nothing, but idle.

It sounds as if it is over heating due to over work.

MangoMan · 22nd July 2013, 22:44

Quote:

Originally Posted by HarryM1BYT

Pressing Ctrl + Alt + Del should bring up Task Manager, if you then click the Processes tab. If you then look down the CPU column, it will show which process is using al of that CPU time. It is normal for System Idle Process to be using a large amount of the CPU time, it is the process which does nothing, but idle.

It sounds as if it is over heating due to over work.

Thanks.
I started it in safe mode and then the CPU runs at between 0-3% but it still reboots after a few minutes.
It doesn't seem to be overheating.

guru · 22nd July 2013, 22:55

It could still be malware. There are bugs out there now that bury themselves so deep in the OS that once infected even the likes of malware bytes can't detect or remove them. Case in point was a laptop we had brought in, nothing we tried could find any form of infection however when we removed the hard drive and popped it onto out test rig it was found to be riddled. Sadly in that case the virus was so ingrained in the OS that removing it killed the patient and we had to reinstall anyway, however fortunately we were about to save his data!

MangoMan · 22nd July 2013, 23:36

I thought of reinstalling the OS but it doesn't stay on long enough to do it...!!!

BaroqueMoon · 23rd July 2013, 02:38

May I suggest running in command line mode. Run chkdsk /f
Then try removing a RAM module and see how you go.

Anthony & Maricel · 23rd July 2013, 06:13

Quote:

Originally Posted by MangoMan

I thought of reinstalling the OS but it doesn't stay on long enough to do it...!!!

It sounds very much like you have picked up some malware, try installing spybot S&D and run it that should find what's infecting your machine. But if you want to do a fresh install of windows then follow the instructions below.

Boot up in dos and type format c: this will format the hard drive before trying a fresh install of windows. Once formatted reboot with your windows disk inserted in the pc and start a fresh install. If it reboots during this process, Then you could have a memory module fault, the CPU fan could not be running properly, your CPU is on it's way out, or your motherboard or something plugged into your mother board has developed a fault.

22nd July 2013, 15:16	#11
guru Posted a thing or two MG ZT, Rover Sterling, MG ZS EV & BMW X5 Join Date: Nov 2010 Location: The Norfolk Broads Posts: 1,491 Thanks: 20 Thanked 196 Times in 117 Posts	High CPU usage could either be because the system has slowed the clock speed right down to try to deal with an overheating event or you have malware which is busily joining it's friends is a DDOS attack somewhere in the world. Try downloading and burning a live Linux CD, boot off of that and see if the machine reboots or is OK. If it still reboots it does sound like a mainboard issue (maybe heat?) if it's fine then it's probably software. __________________ My car history http://m6jkk.com

22nd July 2013, 19:30	#14
MangoMan This is my second home Looking.... Join Date: Oct 2010 Location: England Posts: 10,911 Thanks: 862 Thanked 1,111 Times in 868 Posts	Thanks again for all the advice... Have the PC currently not online, plus I ran a good malware, Malwarebyte Anti-malware - all clear. Changed the Power Supply Unit in case it was that.. Will try the Ram swap tomorrow. I do have a friend who's a bit of a fundhi but he's away at the mo... Thanks all again. I will say it seems better today, sometimes running for an hour or more! But the 100% CPU worries me...? And it doesn't get hot... Hardly warm to the touch...??? __________________ *Regards, Bill - (MangoMan).* (Member 00854) http://i1110.photobucket.com/albums/...d.jpg~original

22nd July 2013, 22:55	#17
guru Posted a thing or two MG ZT, Rover Sterling, MG ZS EV & BMW X5 Join Date: Nov 2010 Location: The Norfolk Broads Posts: 1,491 Thanks: 20 Thanked 196 Times in 117 Posts	It could still be malware. There are bugs out there now that bury themselves so deep in the OS that once infected even the likes of malware bytes can't detect or remove them. Case in point was a laptop we had brought in, nothing we tried could find any form of infection however when we removed the hard drive and popped it onto out test rig it was found to be riddled. Sadly in that case the virus was so ingrained in the OS that removing it killed the patient and we had to reinstall anyway, however fortunately we were about to save his data! __________________ My car history http://m6jkk.com

22nd July 2013, 23:36	#18
MangoMan This is my second home Looking.... Join Date: Oct 2010 Location: England Posts: 10,911 Thanks: 862 Thanked 1,111 Times in 868 Posts	I thought of reinstalling the OS but it doesn't stay on long enough to do it...!!! __________________ *Regards, Bill - (MangoMan).* (Member 00854) http://i1110.photobucket.com/albums/...d.jpg~original

23rd July 2013, 02:38	#19
BaroqueMoon Gets stuck in Rover 75 Saloon Join Date: Jul 2012 Location: Ballarat Posts: 937 Thanks: 576 Thanked 114 Times in 99 Posts	May I suggest running in command line mode. Run chkdsk /f Then try removing a RAM module and see how you go. __________________ Love my 75 and it loves me Membership Number 1703 This vehicle was the 82,624th 75 to run off the production line, out of 112,381 This vehicle was the 6,161st 75 2.5 V6 Contemporary to be made out of 8,214 This vehicle was the 9,755th 75 in White Gold Metallic (code: GMN) to be made out of 12,251 White Gold Metallic 75s

22nd July 2013, 15:18	#12
jubbarelly I really should get out more....... MG ZT 180 SE Poseidon, Peugeot 508 GT Sport Tourer Join Date: Oct 2012 Location: Wolverhampton Posts: 2,509 Thanks: 232 Thanked 266 Times in 185 Posts	You need to see what application is running the cpu at that %. Plus the PC maybe BSODing without you realising so when you first turn the PC on keep tapping F8 then scroll down to: Disable automatic restart on system failure. If it is BSODing then the PC will stay on the BSOD screen (blue screen of death) In there there will be a 0X000XXX code which will relate to what's happening, just Google that and it should shed some light.

22nd July 2013, 16:48	#13
Moodster020 Loves to post MGZT CDT Join Date: Oct 2010 Location: Doncaster Posts: 272 Thanks: 11 Thanked 48 Times in 32 Posts	I had this at one point. It turned out to be.... The Power supply unit! What had happened was, there was a build up of dust inside the unit eventually leading to a sort of a flashover, so it couldn't provide enough power for it to run, so the PC just shut down or rebooted. Got a new one & it worked super. That was 10 years ago mind! HTH