Hi, 

My name is Carl. As of a the last three days, I've been having quite a few system crashes. This happens almost anytime when I am either trying to surf the web, playing music or movies, or trying to run a game. Usually what happens is that after a few minutes (sometimes after an hour) of running a program, or going on the internet, the computer begins a crash dump and gives me the following stop error:

  0x0000007f (0x0000000000000008, 0x0000000080050031, 0x00000000000406f8, 0xfffff800028d3314)

Usually after the dump, the computer will lock up and not restart forcing me to manually shutdown the system. I've already contacted Dell Support and we did the following in the order listed:

Memory Diagnostic - No errors found

Replaced video drivers via remote controll from Dell

Clean reinstallation of Windows 7 - with new partitions

Individually Checked Memory sticks (2x2gb ddr3) - computer crashed both times

Dell believes that the memory stick may be deffective but I was seeking a second opinion since the computer has run exceptionally well on Windows 7 64bit Home Premium since about mid November when it was upgraded. Is this a hardware problem? What do you think I should do to resolve this issue? This is a matter of some urgency to be because I am taking two online courses and I would hate to have a crash while taking an exam. Thank you very much for you time and patience.