Blue Mini Dump Screen

Windows Vista Home Premium, 2GB RAM, BitDefender Internet Security 2009.

I have had my computer on all day doing various things and no problems. Suddenly when I went to my RoboForm and selected the Logins I got the blue screen. I shut down, restarted and everything was fine. I was in my email and again went to RoboForm and selected Logins and got the blue screen again.

Under files that might have something to do with this it said:
C/Users/My Name/AppData/Local/Temp/WER-103163-0.sysdata.xml
C/Users/My Name/AppData/Local/Temp/WER2EEC.tmp.version.txt

On the blue screen itself there were several numbers and the first was 0x0000008E.

Does anyone have any ideas what might have caused this?

Thank you.