hi..
yeah.. i observed that the explorer is crashing when i right click on a VOB file, that too in Documents folder.. I was not able to figure out why it is happening.. When i open firefox, after some time, it crashes..
I have checked out all the processes for any such worms/malware.. but, could not find any.. I observed that there is an update to windows defender in my installed updates at the time before the problem arose.. do you think that is the issue?