I too have been struggling with this problem.
vsdatant.sys can be located on my computer.
It has been the cause of innumerable BSODs.
I have located the file - and under Safe Mode - can delete it - -
BUT - - when I delete vsdatant.sys, my WiFi card becomes disabled, and I CANNOT fix that.
I have re-loaded the WiFi card drivers - to no avail - - however - -
When I make vsdatant.sys available to the system, WiFi capabilities are restored.
Being sick of the Zonealarm garbage - I have updated to the Comodo Firewall - -
But without uninstalling Comodo, I cannot install the current Version of Crapalarm to see if the BSOD will go away.
NEBD have any suggestions ??