System shutdown issue.

[iNPUt]

Hi there, I've had this problem for a while and I haven't been to fussed to get help but here I go.

When I shut down my pc everything seems fine,power lights turn off (FD R2), Screen turns off, hard drives spin down, then my fans keep spinning, it will do it till I hold the power button to properly shut it down. This does not happen everytime.

PSU is ruled out since this is a new one and happened with the old PSU (in my old case). I think it may be my motherboard giving up life.

My Specs:
Q6600 (on stock atm)
ASUS p5kc
Corsair XMS2 4GB
Fractal Design R2 650w PSU
ASUS 4850

Any ideas guys?

 

[iNPUt]

Anyone?

 

[iNPUt]

Bios upgrade is first step and reset defaults, have you tried a fresh windows install by any chance. I know it doesn't sound related to this but I remember reading something like this before.

Mmm thats the point this only happened since windows 7 but it seems like everything has stopped, will try a BIOS update when I can work out that USB flash thing.

 

[iNPUt]

Ok just update my BIOS just waiting for window7 to sort the drivers out, if there is still a problem will have a look at ACPI, and if that doesnt work will just give up can't be bothered to re-install 7.

edit: 2 shutdowns since update and haven't had any issues, will see if it can carry on

cheers guys