Stop error message

Last night while watching a You Tube video, my screen went blue and the following Stop Error number appeared: 0x0000007E (0xC0000005, 0x806D2753, 0xBaaFBC28, 0xBAFB924

I did run the Driver Test and no errors were detected.  I have a Dell Inspiron 6000 laptop.  No new software has been installed, but I did recently replace my 512 mb of memory with two 1 GB chips.  I referenced the Dell site to get the specs on the correct memory before buying.

The computer restarted but what causes the stop error?  Should I expect it again?