That sounds like 1 of 2 things
1-some new software (including Windows updates) is getting in the way of your captures
2-your computer hardware is failing
Read Bill Hunt on BSOD http://forums.adobe.com/thread/772169
I agree with John T. BSOD's are most often caused hardware issues, such as overheating of a component, or a failing, or undersized PSU.
Also, general system drivers can cause failure. Often, those are outlined (though maybe not in really adequate detail) in the Event Viewer's log. In that article, that John T. linked to, there is another link to "Finding Clues." It goes into more detail on using Event Viewer to explore warning, or error messages. If your testing of your system's components and heat, do not yield a weak link, see that one (no pun intended). It is in Reply # 3.