BSODs running Vista (Stop:0x0000001a/0x0000000a/0000004e)

[Dahoe]

My first post here so hi to all and hope you can help me.
I've been getting BSODs for the past few months they started with 0x0000001a but have now moved onto mostly 0x0000000a & 0x0000004e.
I've followed "read this before posting" but they're still occuring. Although the one thing I wasn't able to check was the power supply as not sure how to.
System is a Dell Inspiron 531 desktop running 32bit Vista Home Premium with Service Pack 2 and all current updates installed.
No new hardware has ever been added to the PC so it's as it came from Dell.
Unfortunately, due to Disk Cleanup I think, the memory dumps were deleted but I've managed to recover some of them using File Scavenger so have attatched them.
Any help or ideas are much appreciated.

 

[Tmagic650]

Could be power supply related... Can you check the memory using Memtest86?

Try this free Dell health scan:
http://support.dell.com/support/index.aspx?c=us&l=en&s=dhs

 

[Dahoe]

I ran Memtest overnight on both sticks of RAM individually and both together and no errors reported.
Meant to mention earlier that i ran the full built in dell diagnostics from the boot menu and that found no errors either.
Also ran Seagate Tools long test on both hard drives and they passed.

 

[Tmagic650]

Next thing to try is another power supply...

 

[Dahoe]

As i don't have access to a spare i'll have to buy a new one.
I only want to start buying parts as a last resort. Is there anything else i can try through Windows or other software that could confirm that it's the power supply?
Was hoping it was just driver related and that the mini dumps might point in the right direction as i've no idea how to read these myself.

 

[Dahoe]

Does anyone know of any good software to run diagnostics on a power supply?

 

[Tmagic650]

The power supply affects every other part of the computer so, it would be difficult for software to test one. There are physical power supply testers, but these testers only tell you that all (7) or so voltages are being produced or not. If a supply can't provide the proper amount of current on just one voltage, problems like yours can happen. Dell power supplies are well known to have issues after some time

 

[Dahoe]

Ok so, i'll order a new one in later today.
I'm looking at a Corsair CX500 V2 (Manufacturer SKU:CMPSU-500CXV2UK), sorry not allowed to post a link yet, as it's only €45incl delivery at the moment.
I take it it's no harm to have the bit of extra power? My current power supply is a 300W AcBel PC6035.

 

[Tmagic650]

That Corsair should do fine

 

[Dahoe]

Well I replaced the power supply last week and all was well until the other day when the blue screens began again.
I've enclosed the minidump files.