Thanks for your report. I’m not able to track where those SnxN blocks come from…
Can you please post a screenshot of “poolmon -iSnx?” command?
Or even better: can you please download http://public.avast.com/~kurtin/osrbang.exe (x86) or http://public.avast.com/~kurtin/osrbang_x64.exe (x64), crash your system and upload compressed \Windows\memory.dmp (rar/7z) somewhere? (our ftp instructions: https://support3.avast.com/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=18)

Thanks!