Guys

I have started to get BSOD on my system which has never had a problem for the last 2-3 years. So I guess something is on its way out.

I cant think of any software that I installed shortly before these BSOD and I have not added any hardware.

Last 5 mini dumps attached.
Cheers

Could be an overheating problem caused by a failed processor fan, bad ram, a failing power supply, etc.

Have you given the inside of the case and the components a good dusting down?

Remove the processor's cooling unit, remove any dust, blow out any dust in the PSU with a can of compressed air. You can also remove the cards, RAM modules, clean and reseat them. Just make sure that you earth yourself on the case with the PC and the mains switched off but still connected before you touch the components.

Microsoft Windows Memory Diagnostic utility -

"The Windows Memory Diagnostic tests the Random Access Memory (RAM) on your computer for errors. The diagnostic includes a comprehensive set of memory tests. If you are experiencing problems while running Windows, you can use the diagnostic to determine whether the problems are caused by failing hardware, such as RAM or the memory system of your motherboard. Windows Memory Diagnostic is designed to be easy and fast. On most configurations, you can download the diagnostic, read the documentation, run the test and complete the first test pass in less than 30 minutes." Obtain the full instructions and download from this page. -

http://oca.microsoft.com/en/windiag.asp

Hi,

The culprit is faulty memory. You can run memtest to stress the ram. If memtest reports the ram is faulty, ram is bad. However Memtest is not a perfect tool to test the memory as some faulty ram can pass memtest.

Suggestion
1. Check the temperature of the CPU and make sure that it is not overheat (ie temperature < 60C)
Make sure that the CPU fan works properly
2. Reseat the memory stick to another memory slot. Reseat video card as well.
3. Downclock the ram. Check to default setting if you video card is overclocked.
4. Clean the dust inside the computer case
5. Make sure that the ram is compatible to the motherboard
6. Check the bios setting about memory timing and make sure that it is on
For example : DIMM1 and DIMM2 do not have the same timing.
DIMM1: Corsair CMX512-3200C2 512 MB PC3200 DDR SDRAM (2.5-3-3-8 @ 200 MHz) (2.0-3-3-7 @ 166 MHz)
DIMM2: Corsair CMX512-3200C2 512 MB PC3200 DDR SDRAM (3.0-3-3-8 @ 200 MHz)
DIMM3: Corsair CMX512-3200C2 512 MB PC3200 DDR SDRAM (3.0-3-3-8 @ 200 MHz)
7. Make sure that your PSU have adequate power to drive all the hardware including USB devices
8. Run chkdsk /r at command prompt
9. Run 3DMark 2005 to test your video card
10. Upgrade BIOS
11. If you have on-board VID. De-install and remove your ATI display card and use on-board VID./

If it still crashes, diagnostic which memory stick is faulty
Take out one memory stick. If windows does not crash, the removed memory stick is faulty.