Windows 7: Occasional BSOD

I recently upgraded to Windows 7 Ultimate 64bit. Since yesterday evening I've encountered two stop errors. Both incidents occurring quite far apart from each other. I have a feeling it might be related to Flash, as the first time it happened while listening to a song via a flashplayer, and the second being moments ago, right as I opened a page to watch a live streaming game development tournament. More concerned about the BSOD than missing the thrilling coding tournament.

Anyways, any help would be much appreciated.

EDIT: I am now entirely unsure of the cause, as I tried to reproduce what happened earlier and I was actually successful in viewing the stream.

Complaining about NOT getting a BSOD? (just kidding!)

The dump files point to: WUSB54Gv4x64.sys Wed Dec 27 04:41:31 2006
This is a USB wireless adapter driver, which is also seriously outdated.
Also, there have been known issues with some of these (with RaLink chipsets) in the 64 bit flavor - but that has recently been fixed.

Please go to the website of your device manufacturer and download the 64 bit, Windows 7 version of the driver and install it. Test to see if that remedies your problems (if you don't get a BSOD in a day or two, it's probably fixed).

Well, the device manufacturer's website had drivers for 32 bit vista and a another 4 year old driver. I googled the model number and found others who shared the same problem with it and windows 7. RaLink makes the chips for the adapter, so I downloaded the appropriate driver for 64bit windows 7 from them. Uninstalled previous driver, updated device driver using RaLink's driver and it successfully installed. Now waiting for BSOD (or lack thereof).

Thank you very much for your help!