Frequent BSOD's.. at wits end :(

I looked at all six of your dumps. Five of them blamed memory corruption or memory management and one simply blamed hardware. One of the dumps was a Driver Verifier enabled dump. It was the one that blamed hardware.

Stop error code 50, PAGE_FAULT_IN_NONPAGED_AREA - usually caused by Defective hardware (particularly memory - but not just RAM), Faulty system service, Antivirus, Device driver, NTFS corruption, BIOS.

Stop error code 24, NTFS_FILE_SYSTEM -usually causes are Disk corruption, insufficient physical memory, Device driver, Indexing, Resident antivirus, backup, defrag programs, Disk/Drive failing/failure.

Stop error code 1A, MEMORY_MANAGEMENT - usually caused by Device driver, memory, kernel.

Stop error code C4, DRIVER_VERIFIER_DETECTED_VIOLATION - usually caused by a device driver.

Stop error code A, IRQL_NOT_LESS_OR_EQUAL - usual causes are Kernel mode driver, System Service, BIOS, Windows, Virus scanner, Backup tool, compatibility.

I still see this driver in your latest dumps:
ASACPI.sys Sun Mar 27 22:30:36 2005 - Please install the latest ATK0110 Utility for Vista/7 from this link: ASUSTeK Computer Inc.-Support-.

I also find this outdated driver: anodlwfx.sys Fri Mar 06 05:10:08 2009 - Alpha filter driver, Alpha Networks, Inc, Alpha Networks Inc.. I am guessing this is a wireless or Ethernet adapter driver. Try to update it via your wireless or Ethernet adapter manufactures website.

That is good news - except for the black screens.

Alpha networks is a spin off from D-Link. See if you can update your adapter drivers from D-Link. It might have some bearing on your black screens.

I suspect that ASACPI.sys was the main cause of your BSOD's. The 2005 version is almost guaranteed to cause crashes.

That infamous driver belongs to Asus ATK0110 ACPI Utility and is also a part of the Asus PCProbe and AISuite Utilities. You would not believe how many times we have encountered that monster. :)

The Alpha driver may work; but if you can update it, it would be a lot better.

Guys, thanks to you my BSOD's seem to had gone! So thumbs up for your assistance.

I am occassionally getting black screens now, requiring a hard reboot. This can be in or out of a 3D application. WOuld you have any idea on that? Sorry to push my luck - I know it's the wrong colour screen!

Edit: Just had a blue screen after installing a few drivers.... have rolled back just in case and will not touch anything for a few days! Had a PAGE_FAULT error.

Memtest will take about seven hours. You should run it over night. I am not familiar with the test you ran; but that indicates further testing and that you may well have a problem with the CPU. I just do not know how much trust to put in that test. I do not remember how long I ran Prime (old timers disease).