Invalid Process Detatch Attempt

[GazzaMataz]

I have an Overclockers Titan system Intel i7950 overclocked to 4.00ghz. With a nVidia GTX 460, 6gb RAM, ASUS P6X58D-E mobo.

I have had it since April last year and it has been a great system until recently. I do a lot of 3D work and I have found that when I setup my machine to render a bit image that it crashes with this error:

INVALID PROCESS DETATCH ATTEMPT

So why was it working fine for months and now starts to play silly buggers?

I could update my GPU driver but that has been working fine and I am loathed to change it - if it works don't fix it.

Can anyone shed some light?

 

[GazzaMataz]

Here is some info I have gathered on the problem:

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.256.48
Locale ID: 2057

Additional information about the problem:
BCCode: 6
BCP1: 0000000000000000
BCP2: 0000000000000000
BCP3: 0000000000000000
BCP4: 0000000000000000
OS Version: 6_1_7601
Service Pack: 1_0
Product: 256_1