bsod

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.

Did you remove Kaspersky with the Kaspersky Removal tool for remove all remnants?

http://support.kaspersky.com/common/service.aspx?el=1464

This is a known issue…

http://forum.avast.com/index.php?topic=108689.0

I removed Kaspersky with the Kaspersky removal tool. I looked through the other posts that this is a known issue, so, there is no known fix then? will I need to use the avast clear tool and swich to a different AV program?