Win7 64bit Ultimate, occasional video crashes

I have occasional video crashes.
My Video will go black but retains sound.
Sometimes I get alarm or video freezes and the occasional BSOD.
I Ran Driver Verifier to try to figure out if it's a driver conflict.
But--I'm clueless as to what I'm looking at with the log file. (Using BlueScreenView to look at dump.)
I have a Win7 64bit Ultimate
HDMI 32" tv as monitor
AMD Radeon R7 260X 2gig GDDR5.
Any help would be greatly appreciated.

070518-20280-01.dmp 7/5/2018 12:01:23 AM
SYSTEM_THREAD_EXCEPTION_NOT_HANDLED 0x1000007e ffffffff80000003 fffff80002f0d178 fffff8800407d5f8 fffff8800407ce60 fltmgr.sys fltmgr.sys+1a960
Microsoft Filesystem Filter Manager Microsoft® Windows® Operating System Microsoft Corporation 6.1.7600.16385 (win7_rtm.090713-1255) x64 ntoskrnl.exe+ab177
C:\Windows\Minidump\070518-20280-01.dmp 4 15 7601 275,856 7/5/2018 12:03:06 AM

The stack indicates that the last non-Microsoft component executed was aswMonFlt.sys. This is a file system minifilter driver, part of an antimalware package by Avast.

Try updating it. If that doesn't help, uninstall it and use something else.

It would be helpful if you could zip up your last half a dozen or so of the minidumps so I could see if they're consistent with this one.