I have acquired a problem in the past couple of months with Vista locking up. Pressing the reset seemingly being the only way to restore normality. I know not where this fault has originated , ie I can't trace it to a particular software/hardware change on my PC.

My system is quite modern and used to work fine so I am fairly certain it is not hardware induced so I won't go into great detail except to add that on the video side I have 2 X NVIDIA GeForce 9600 Gt's working in SLI.

The most common activity when it freezes is to be watching video, usually WMV, although another area it seems fairly frequent is whilst having conversations on chat sites (makes you look really rude!)

I checked the Windows application log and whenever this happens it always seeems to say:

! Information Date/Time LoadPerf 1000 None
! Error Date/Time LoadPerf 3011 None
! Error Date/Time LoadPerf 3012 None

Tried searching for solutions to the LoadPerf stuff but not being a technocrat kept mentally disappearing up my ***.

Any ideas - short of a total back-to-the-drawing-board solution - would be greatly appreciated. Sorry about the length of this but it's driving me nuts.