I recently got rid of Kaspersky 2014 because it was causing problems with my os ( win7 64 bit). I downloaded avast free version and all went well. or so I thought. I now keep getting blue screens at least once a day and who crashed is telling me it is cause by aswsnx.sys (avast! Virtualization Driver, AVAST Software). is there a way to fix this, is this something in the free program to force me to update, or do I need to try a different av program? thanks for any help someone can give me.