First, I apologize in advance for the small novel I am about to write. I am having an issue supporting the laptop that I purchased for my fiance back in October of 2007. I bought her a Dell Inspiron 1721 which came with Windows Vista Home Edition, I know next to nothing about this OS. In May 2008 (I'm not sure exactly of the date) the computer began to blue screen at random. This problem occurred once or twice a week. Checked for Viruses, Spyware, other malware but found nothing. I took note that I had only purchses 1gb worth of RAM (why is beyond me), so my immediate thought was this could be causing the issue as I have been told Vista requires a minimum of 2gb RAM to run properly. I purchased 4gb RAM from Dell around July 4th and installed it, since I installed the new RAM the blue screen has been happening at least once per day and its driving me up the wall (well, she is drving me up the wall about it). I thought maybe the RAM was faulty so I ran MemTest86 on it, watched it for a few hours with no error and then left it running overnight, on errors found when I checked again in the morning. I looked around some forums (this one included) and noted people having compatibility issues with Norton Internet Security on Vista, it was causing simila crashes. I went ahead and uninstalled Norton and installed Avast, that did not fix the issue. Called Dell tech support (joy), and ran some diagnostics with the tech on the phone. Win debug showed that the issue was hardware related so we ran a hardware test (via Fn key held down at startup), no issues found. Reliability monitor showed that the issue may be related to google toolbar so we removed that in hopes it would fix the issue. This was done last night (July 26th) and today it has blue screened twice. Attached you will find 3 files: Zip file of the Minidumps that have occured within the last few days. Text file containing the text of the windows startup popup after one of today's dumps. Screenshot of the Dxdiag. (I don't know, someone said it might help to display this too) Thank you in advance for your assistance.