Windows PC restarts when I shutdown...

Hi everyone,

I finally built my first computer this weekend. It's going great, but I'm having problems turning it off (not just because I can't stop playing with it). When I hit shut down on the start menu it shuts down, only for it to restart a few seconds later. If I hold the power button when it starts restarting then it turns off. Not a huge problem but kind of niggling.

I wondered if anyone could help? I know I could flash the BIOS but I'd like to leave that as a last option ideally...

Here's my build:

Mobo: GA-Z68MA-D2H-B3
CPU: Intel i5 2500k
RAM: Kingston HyperX Blu 8gb
HDD: Samsung Spintpoint F3 1tb
OS: Windows 7 Home Premium 64-Bit
PSU: OCZ ZS Series 550w

Here's what I've tried so far:
Updated the BIOS to f9
Updated all drivers
Reset CMOS (removed battery for an hour)
Checked power options
Disconnected network cable/usbs

Completely at a loss now, hoped you could help! Dropped £90 on this mobo and can't return it, so if there's any fix to this annoying problem it'd be great.

Thanks!

 

So it restarts when you click the shutdown button on windows?

First things first, you sure it's not assigned to restart rather than shutdown? It can be assigned to restart, shutdown, hibernate and so on.

Go to Start and right click the shut down button and click properties, check start menu tab and that the button is assigned to shut down in the drop down menu rather than restart.

 

It restarts if I press shut down on the start menu or the button on the case. The shut down button is assigned to shut down.

 

Also, I've tried making a Ubuntu live disk and seeing if it shuts down with that... no luck. Looks like I've got a duff mobo doesn't it...

 

There's a chance it's a PSU issue. If all else fails can you test an alternative PSU? I'm guessing as it's your first build that might be a no. Even an old family PC could do the trick for a limited test run!

 

"You can't turn me off Dave" (HAL 9000)

I agree, it sounds to me a PSU issue. Try a different one.

 

I had an OCZ psu doing the exact same thing. Seemed it was shorted out. Even out of my system and only plugged into the wall it would be on, had to RMA it to be sorted for me.

 

I presume it's not the case power button connection to the mobo that's the issue and/or that the case button is not somehow physically stuck?

 

Try this, open a command prompt, start > run > cmd

shutdown -s -t 0

You might need to add a -f to force it if it's locked (shouldn't need to though) and see if it stays shutdown then.

 

Thanks guys, tested another (really really dodgy looking) PSU in my machine and it worked perfectly. Sent this one off for RMA but had to buy another one in the meantime as I have too much work to do to be without the pc, suppose I'll have to sell the replacement when I get it!

 

You could ask if the retailer is open to a refund once the fault has been confirmed by them.

 

It's Overclockers, from what I've read it's unlikely they'll find a fault in the first place! I did include a video of the problem though. Just hope they can recreate it otherwise I'll have to pay another £20...

 

I bought the same model to use while the original's in RMA. Plugged it in today, exactly the same problem. I'll be returning this one too, I think.

OCZ must just hate my computer or something, this is crazy.

 

Just Uber unlucky mate, welcome to PC building. I does get better.

 

You dont happen to have a wireless card do you?

 

Oh yeah, that can cause this issue. If you look about the t'interweb there are a few cases reporting that.