Hello there, i have been having a numourous amount of trouble. I recently bought my PC at the start of the month, and have spent pretty much all of my time attempting to diagnose the problem. My specs are: AMD 64 BIT motherboard Dual core 3800+ 1G RAM 160 GB HD GeForce 6600 512 Ok, my PC keeps restarting with the BSOD happening. This is what is shows me all the time: - Error code 100000d1, parameter1 0000400b, parameter2 00000002, parameter3 00000000, parameter4 f7012315. I click onto the Help n Support and get: - Product: Windows Operating System Event ID: 1003 Source: System Error Version: 5.2 Symbolic Name: ER_KRNLCRASH_LOG Message: Error code %1, parameter1 %2, parameter2 %3, parameter3 %4, parameter4 %5. Ok, i am not sure what it is though. But when it does show me the BSOD quickly... It shows: - DRIVER_IRQL_NOT_LESS_OR_EQUAL I can run the basic MSN, and IE running in the background. But, if i try and install and try and play a game, it crashes. Thus restarting the PC and giving the error. If any help or advice, or anyone recieved this error before, please post, i'll be most grateful, Regards, Shen.