BSOD on Vista x64 with Thinkpad X61s. Where do I start?

[leesiulung]

I have a Thinkpad X61s with Vista Ultimate x64 (with all the latest patches) installed. I installed all the latest drivers in about a month ago.

I get BSODs every now and then, but most notably when playing a video on an external screen. Where do I start when diagnosing this?

I did the following:

1) There is a crashlog, but it appears only to have the drivers installed on my machine. I don't remember where I found it though, but has extension .log

2) When I first bought the machine and installed 3rd party RAM, I tested it with memtest on both the regular and the deep scan. I ran each for at least 10 hours straight with no problems.

3) BSOD problems happened recently after I clean re-installed Vista x64 (previously ran fine) on the machine, installed the latest drivers and turning on bitlocker. Prior to that I had no problems....

I did some searches, but most don't apply to me. Help would be very much appreciated.

[dr_st]

Where do I start when diagnosing this?

By googling the stop code you are getting, and reading forum threads / KB articles describing the problem, possible causes and solutions.

[leesiulung]

By googling the stop code you are getting, and reading forum threads / KB articles describing the problem, possible causes and solutions.

Is there a log or somewhere on my computer I can find this code for the crash instead of waiting for it to happen again?

It does some kind of memory dump when it happens, but doesn't say where.

[dr_st]

Most likely in WINDOWS\MiniDump.

Use DumpChk.exe.
http://support.microsoft.com/kb/156280