Boot in safe modus stalls on aswrvrt.sys

Boot in safe modus stalls on aswrvrt.sys. After some time Windows vista starts, but the system keeps freezing up.

I can see no malware there. Are you able to get into windows long enough to change some avast settings ? If so disable behaviour shield

i don’t know why but that seems to be working for me. do i need to do anything else ?

OK so all is back to normal with the behaviour shield disabled ?

yes

It may be worth using the latest version and see if that works properly http://forum.avast.com/index.php?topic=133788.0