Hi ladies and gents, I've had a little look around and from what I can gather rarely do you find two people with the same BlueScreen error code. After shutting my PC down last night, I booted it up again today. All seemed normal until I got a warning sign that "apparently" my PC wasn't shut down properly which I assure you it was. It then ran ok for 5 - 10 minutes before going a little bit bonkers. The screen went funny with lines both horizontal and vertical appearing to warp the screen a little. It then went black and then blue, then normal again back to black and then restarted itself and pretty much done the safe thing two more times. I've got it started up in safe mode at the moment, I ran AVG antivirus on it it and performed a CCleaner scan and all seems fine. Also, about 2 weeks before christmas I purchased an extractor fan/Graphics card cooling device which hooks up to the power supply in the computer to help cool the Graphics card, my plan was to help prolong the life of it a bit as I've had the PC a couple of years. The BlueScreen error details I am receiving are: Problem signature: Problem Event Name: BlueScreen OS Version: 6.1.7600.2.0.0.256.1 Locale ID: 2057 Additional information about the problem: BCCode: f4 BCP1: 00000003 BCP2: 889CF5A0 BCP3: 889CF70C BCP4: 8327EDD0 OS Version: 6_1_7600 Service Pack: 0_0 Product: 256_1 Files that help describe the problem: C:\Windows\Minidump\010711-30716-01.dmp C:\Users\Joe\AppData\Local\Temp\WER-89326-0.sysdata.xml I'm running Windows 7 Ultimate 32-bit Intel Core 2 Quad @ 2.4Ghz 3GB RAM Radeon HD 3870 x2 Hitachi HDS721075KLA330 750GB HDD One other thing I'll mention is that it used to be 4GB RAM until I was getting a system boot problem. I done a trial and error of removing each of my RAM cards and found that a single one of them was defective so I removed it. But knowing 32-bit Windows can only recognise up to 3GB RAM anyway I figured it wasn't such a big deal at the time but that prompted me to purchase and install the Graphics card cooler. Thanks for your time and help guys.