Author Topic: [fixed] Blue Screen (BSOD) - Windows 10 Anniversary Update on Skylake CPU  (Read 32218 times)

0 Members and 1 Guest are viewing this topic.

Offline petr.chytil

  • Quality Assurance Director
  • Avast team
  • Full Member
  • *
  • Posts: 124
How to prevent and fix
All Avast installations should be patched now but in case you need a step by step help - https://www.avast.com/en-us/faq.php?article=AVKB272#artTitle

What happened (simple version)?
Avast Antivirus without Thursday’s patch + Windows 10 Anniversary Update + Intel Skylake with Intel VT on = BSOD.

What happened (in detail)?
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.

When was it fixed?
For a better insight into what was patched and when, please see the following timeline.

Timeline (CEST):
Aug 2 8PM - Window 10 Anniversary Update starts rolling out
Aug 3 1AM - First mention on forum about the BSOD
Aug 4 8PM - Emergency update released for Avast 12.2.2276 - clean online installations are fixed
Aug 5 9AM - Emergency update released for Avast 12.1.2272, 2016.11.2.2262, 2016.11.1.2253, Avast for Business 12.1.2512, 11.2.2511
Aug 5 9PM - Avast Emergency update is scheduled to run every 12 hours or about 10 minutes after system startup.
All above mentioned versions should now be patched.

Is Avast Antivirus compatible with the Windows 10 Anniversary Update?
Yes. For the time being, however, please don't perform installations using offline installers without an internet connection. We will update offline installers later.
Update: Offline installers of Avast Antivirus 12.3.2279 already contain the fix - https://forum.avast.com/index.php?topic=189836.0

Why was the incompatibility not discovered sooner?
We're still investigating the answer to that. Neither the Windows Insider program nor the Avast Antivirus Beta channel indicated any forewarning of such behavior.

Thank you!
We're very thankful to our Avast users especially those who posted here on the forum! You helped us discover the root cause much faster which drastically sped up our delivery of the fix.

Have a good day,
Petr
« Last Edit: August 16, 2016, 06:20:50 PM by petr.chytil »

Offline RejZoR

  • Polymorphic Sheep
  • Serious Graphoman
  • *****
  • Posts: 9406
  • We are supersheep, resistance is futile!
    • RejZoR's Flock of Sheep
I like the openness and verbosity of these reports (these forum stickies) when issues arise. It shows you guys are stepping up the QA game. I like it.
Visit my webpage Angry Sheep Blog

REDACTED

  • Guest
A true indicator of character is in how one handles crisis under stress.  Back-to-back fires handled with professionalism.  Another job well done, your team deserves a break!

Offline Gopher John

  • Avast Evangelist
  • Super Poster
  • ***
  • Posts: 2098
I like the openness and verbosity of these reports (these forum stickies) when issues arise. It shows you guys are stepping up the QA game. I like it.

I agree. I like the way they owned it and moved quickly to address the problem, all the while keeping us informed.  This shows a very high level of integrity and devotion.
AMD A6-5350M APU with Radeon HD Graphics, 8.0GB RAM, Win7 Pro SP1 64bit, IE11
i7-3610QM 2.3GHZ, 8.0GB Ram,  Nvidia GeForce GT 630M 2GB, Win7 Pro SP1 64bit, IE 11
Common to both: Avast Premium Security 19.7.2388, WinPatrol Plus, SpywareBlaster 5.5, Opera 12.18, Firefox 68.0.2, MBam Free, CCleaner

REDACTED

  • Guest
Thanks for the quick update!   :D

Offline adamchamney

  • Newbie
  • *
  • Posts: 5
Thanks for all the info and all the help petr.chytil in getting my PC back up and running!
Microsoft can learn a lot from you guys!

REDACTED

  • Guest
Awesome support. Thank you!

REDACTED

  • Guest
I had to uninstall Avast in order to update my Skylake CPU computer. I am running Defender at the moment  as I am unclear as to where I should download the patched version to install Avast again. Can someone explain where this is located? The filename on the version released a few days ago which caused the problem do not reflect, as least to, me to be the patch version.    Thanks for any help.   

Offline Alikhan

  • Avast Evangelist
  • Super Poster
  • ***
  • Posts: 2220
I had to uninstall Avast in order to update my Skylake CPU computer. I am running Defender at the moment  as I am unclear as to where I should download the patched version to install Avast again. Can someone explain where this is located? The filename on the version released a few days ago which caused the problem do not reflect, as least to, me to be the patch version.    Thanks for any help.   

Hi,

Just download and install your version - these online versions have the patches included.

http://files.avast.com/iavs9x/avast_free_antivirus_setup.exe

http://files.avast.com/iavs9x/avast_pro_antivirus_setup.exe

http://files.avast.com/iavs9x/avast_internet_security_setup.exe

http://files.avast.com/iavs9x/avast_premier_antivirus_setup.exe
Windows 10 Home 64-bit • Avast Free (latest stable version) •  Malwarebytes 4 Premium (On-Demand) • Windows Firewall Control • Google Chrome • LastPass • CCleaner • O&O ShutUp10 •

Offline Be Secure

  • Long Time Avast User(10years.....) Security Enthusiast.
  • Avast Evangelist
  • Super Poster
  • ***
  • Posts: 1908
Good work Avast! team. :)Keep us updated like this. :-*
PC- Windows10 EDU 64Bit,avast! free 21.1.2449,uBlock Origin,NVT_OSA,GoogleChrome(64bit),CCleaner,Unchecky,ZAM Free,Shadow Defender.
Security Enthusiast

REDACTED

  • Guest
What happened to Browser protection? Is it replaced by Browser Extension? Also what is Antispam? Thanks to anyone who can explain these.

Offline DavidR

  • Avast Überevangelist
  • Certainly Bot
  • *****
  • Posts: 88900
  • No support PMs thanks
What happened to Browser protection? Is it replaced by Browser Extension? Also what is Antispam? Thanks to anyone who can explain these.

Please don't post the same question in multiple topics thanks.

I have answered earlier question, https://forum.avast.com/index.php?topic=189131.msg1330654#msg1330654.
Windows 10 Home 64bit/ Acer Aspire F15/ Intel Core i5 7200U 2.5GHz, 8GB DDR4 memory, 256GB SSD, 1TB HDD/ avast! free 24.2.6105 (build 24.2.8918.824) UI 1.0.799/ Firefox, uBlock Origin, uMatrix/ MailWasher Pro/ Avast! Mobile Security

Offline Ch3vr0n

  • Jr. Member
  • **
  • Posts: 35
This issue may not be fully fixed. See my last post https://forum.avast.com/index.php?topic=189403.msg1330690#new

Offline bob3160

  • Avast Überevangelist
  • Probably Bot
  • *****
  • Posts: 48524
  • 64 Years of Happiness
    • bob3160 Protecting Yourself, Your Computer and, Your Identity
This issue may not be fully fixed. See my last post https://forum.avast.com/index.php?topic=189403.msg1330690#new
Since your system is clearly not a Skylake CPU, it has nothing do do with this issue. This issue has been fixed. :)

Free Security Seminar: https://bit.ly/bobg2023  -  Important: http://www.organdonor.gov/ -- My Web Site: http://bob3160.strikingly.com/ - Win 11 Pro v22H2 64bit, 16 Gig Ram, 1TB SSD, Avast Free 23.5.6066, How to Successfully Install Avast http://goo.gl/VLXdeRepair & Clean Install https://goo.gl/t7aJGq -- My Online Activity https://bit.ly/BobGInternet

Offline Ch3vr0n

  • Jr. Member
  • **
  • Posts: 35
maybe not, but those drivers with a numeric sequence are related. They were mentioned in the first issue too, so it might very well be related.