I'm running XP64; Windows Task Manager doesn't show any instances of Firefox [not with the word firefox or mozilla]. I have firefox installed twice , once on C via xp and the other on D via Win 7. The C copy stopped about a week ago. D ran from either windows until yesterday. Today it doesn't.
My anti-virus is Avast. It doesn't tell me anything about virtualization.
I tried the following:
Press the following shortcut to get a Run window: [Windows] + [R]. This should bring up a window that contains a text field.
In that text field, enter %APPDATA% and press Enter. An explorer window should open.
From that explorer window, double-click on the Mozilla folder, then double-click on Firefox and then on Crash reports. Double-click on submitted.
The word "submitted" does not appear; only 2 installations.
If you do not have a submitted folder, then the reports may not have been uploaded to Mozilla. If you didn't get the crash reporter dialog, Firefox may have hung silently, which isn't detailed out to a file.