You write you got BSODs at 6 months. That's well inside the warranty. Didn't you call it in and get it on record so you wouldn't have to fix it yourself?

Do tell.

Read post 4 at http://forums.lenovo.com/t5/Windows-XP-and-Vista-discussion/Intel-display-driver-igdkmd32-sys-may-cause-a-Stop-Error-Message/td-p/169122;jsessionid=731A53A55BAA559B5B47D2393AE6D12E as if this is a driver issue, that link to intel.com may help.

I have a bad feeling that you didn't report the errors and are now out of warranty with no record it failed inside the warranty period.
Let's hope you have these failures logged at dell.
Bob