We’ve reported yesterday that Avast is causing BSOD on Windows 10 AU installed systems, well Avast has patched the problem by issuing an emergency update to all its product versions –Avast 12.2.2276, Avast 12.1.2272, 2016.11.2.2262, 2016.11.1.2253 and Avast for Business 12.1.2512, 11.2.2511 — just run the EU, you’ll be fine. The company has explained what happened in a forum thread.
Avast fixes Anniversary Update BSOD by issuing an emergency update
It’s the anniversary update combined with aswvmm.sys driver on Intel Skylake processor with Intel virtualization Technology enabled in the BIOS, has caused this, so conflict between Avast’s aswvmm.sys driver and Interl VT produced BSOD, Avast has addressed this by issuing an update. So this issue is limited to certain hardware configurations only, not all affected.
On Tuesday, August 2, Microsoft released their latest version of Windows 10 – the Anniversary Update – via the Windows Update channel. While the majority of our users didn’t have a problem, certain HW configurations didn’t mix well with the update. To be specific, when the Windows 10 Anniversary Update was combined with our aswvmm.sys driver on an Intel CPU from the Skylake family with Intel® Virtualization Technology (Intel VT) enabled in the BIOS, the update resulted in a BSOD. This occured during upgrades to the Windows 10 Anniversary edition from previous versions of Windows, and during clean installations of Avast Antivirus on systems already running the Anniversary Update.
Check the official information here for more details.
At this time, clean online installations are fixed, but not the offline installers, so you should be installing Avast using online installer for the time being. Affected users can apply the fix immediately by running EU: run this from Run dialog and restart after a while.
C:\Program Files\AVAST Software\Avast\AvastEmUpdate.exe