Hi there all, I have only just recently discovered this forum in search of the truth as to why my once reliable desktop seems to be heading towards a slow demise. My problem began about 1-2 weeks ago. The computer just started to randomly hang, then explorer would crash, and got not responding. Then the comp would just die, and restart itself, and when it would restart, the desktop was weird, shortcuts not working, corrupt data etc. I have reformatted and reinstalled vista now 6-7 times. I have run memtest with 1st pass no errors. I have attached my hijackthis log as well. Pretty sure this isnt the problem as the computer has been formatted. Today on my most recent reinstall, I thought everything was fine, then my comp bluescreened itself. I wasnt there to witness it, but when windows restarted there was this windows recovered from a serious error. Here is the message. Problem signature: Problem Event Name: BlueScreen OS Version: 6.0.6002.2.2.0.768.3 Locale ID: 3081 Additional information about the problem: BCCode: 51 BCP1: 00000001 BCP2: 8B626008 BCP3: 00D83000 BCP4: 00000368 OS Version: 6_0_6002 Service Pack: 2_0 Product: 768_1 Files that help describe the problem: C:\Windows\Minidump\Mini091209-14.dmp C:\Users\Chris\AppData\Local\Temp\WER-33087-0.sysdata.xml C:\Users\Chris\AppData\Local\Temp\WERB125.tmp.version.txt _______________________________________________________________ The computer tends to randomly hang as well. The sound of ? hard drive activity ceases for a time, then eventually comes back to life. I had a look at the event viewer, and there have been errors with timeouts with A timeout (30000 milliseconds) was reached while waiting for a transaction response from the SysMain service. A timeout (30000 milliseconds) was reached while waiting for a transaction response from the TrkWks service. Does anyone know what would be my next step from here? Thanks I hope that provides all the information required. Oh in addition, my computer is overclocked by the shop, who told me it should run stable. And it has been since I got it last year.