to boot w/o avast
in recovery mode goto
in C:\Windows\Sysnative\drivers
and rename all files “asw*.sys” to “asw*.sys_”
that will prevent avast init it’s drivers
if you successfully boot to Windows afterward,
Please check for the corresponding minidump files (in C:\Windows\Minidump) and upload them to ftp://ftp.avast.com/incoming
good luck and thanks in advance for the dumps