New custom built PC random instant restarts

Europe

Honorable
May 3, 2013
11
0
10,510
Hey guys, i built a brand new PC around 2 months ago.
It's a gaming PC and i have been using it alot.
I'm very satisfied with it and it has been doing very well.
Until... last week.

Last week i was searching some stuff about bitcoin mining.
So i thought why not mine a bit with my PC.
I downloaded GUIminer and i ran it on my GPU for like 5 mins.
My GPU was 65 or 75 degrees when doing it.
So i thought this wasn't worth it and i stopped it again.
Than i went to the gym, i left my PC on.
When i came back home, my PC wasn't on anymore.
I didn't really think it was a big deal so i just turned it back on.

Than the next day when i woke up i turned it on, had breakfast, and started gaming.
after a while my PC just instantly shutdown and rebooted with some strange sound.

The strange thing is that there seems nothing wrong with the temperature, my PC stays just extremely low on temperature and the gaming goes very well.

This didn't feel good at all so i downloaded malwarebytes antimalware.
When i installed it i did the scan and it immediatly shutdown and rebooted after 5 seconds.

Apparently i found out that it didn't have anything to do with a virus.
so i searched further but no luck.

Here are my system specs :

Operating System
Windows 7 Home Premium 64-bit SP1

CPU
Intel Core i3 3240 @ 3.40GHz

RAM
8,00GB Dual-Channel DDR3 @ 666MHz (9-9-9-24)

Motherboard
MSI Z77A-G41 (MS-7758) (SOCKET 0)

Graphic Card
Club3d AMD Radeon HD7770 GHz edition



PS : I found out that it was already before i downloaded the bitcoin miner when looking at the system logs.

Screenshot of system logs with the problem. It says kernel-power.
40f3245498c6679e97b63238c18facd6.png
 

Europe

Honorable
May 3, 2013
11
0
10,510

My PSU is Corsair CX430

And what i already said the strange thing is that all my temperature of all my hardware is always very good because my fans are good.
Thats why the problem is so strange
 

Europe

Honorable
May 3, 2013
11
0
10,510

When im talking about good, im talking about this

CPU
Intel Core i3 3240 @ 3.40GHz - 34 °C

Motherboard
MSI Z77A-G41 (MS-7758) (SOCKET 0) - 28 °C

Graphics
1024MB ATI AMD Radeon HD 7700 Series (ATI AIB) - 30 °C

Storage
931GB TOSHIBA DT01ACA100 ATA Device (SATA) - 31°C


When im gaming my cpu doesn't go past 40°C most of the times
 

Europe

Honorable
May 3, 2013
11
0
10,510

Did this.
No errors and no shutdown.
I flashed my bios before i did it btw and now lets see if its still gonna happen
 

Europe

Honorable
May 3, 2013
11
0
10,510

And.... it just happened again.
My PC instantly rebooted while i was playing a game.
But this time it didn't restart again.
Actually it didn't boot at all!
I kept pressing the power button on the PC but nothing happened.
So i tried plugging an usb connection in and out and suddenly when i pulled the usb out, it booted!
And after that it happened again.

PLEASE HELP ME