FYI I have the same problem with the same .sys file indicated by the crashdump.
Have tried both the most recent version of Avast and earlier versions, in both normal and safe mode. Also cloned my hard disc onto another drive inbetween installations. Running a scan with Avast causes immediate BSOD with either PAGE_FAULT_IN_NON_PAGED_AREA stop code 50 or BAD_POOL_HEADER stop code 19. Would love this to be fixed as I’m being forced into using AVG!
Noone is forcing you to use avg (or any other software for that matter)
Or is there some mean looking old guy with a loaded shotgun ready to fire standing behind you? ;D
It really would help mentioning the OS (and version) as well as the version of avast and if there is/was any other security software on the system.