Author Topic: WEI fails when Avast is installed  (Read 1709 times)

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Offline Johto

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WEI fails when Avast is installed
« on: February 06, 2019, 03:47:13 PM »
Windows Experience Index fails to complete on Windows 7 with Avast installed. I attached some screenshots showing the error messages.

Offline Asyn

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Re: WEI fails when Avast is installed
« Reply #1 on: February 07, 2019, 05:14:37 AM »
Update to the latest version (19.2.2364): https://forum.avast.com/index.php?topic=225096.0
W8.1 [x64] - Avast PremSec 19.9.2394.B#1 - CC 5.63 - EEK - Firefox ESR 68.3 [NS/AOS/uBO/PB] - Thunderbird 68.3 [EM] - ACP/ASL.BC
Deutschsprachiger Bereich -> Avast Wissenswertes (Downloads, Anleitungen & Infos): https://forum.avast.com/index.php?topic=60523.0

Offline Johto

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Re: WEI fails when Avast is installed
« Reply #2 on: February 07, 2019, 01:36:25 PM »
The update didn't fix the issue. The problem is still there.

The only solution I got to fix it is to uninstall Avast. Even disabling the shields or performing a clean boot doesn't work.

Offline Asyn

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Re: WEI fails when Avast is installed
« Reply #3 on: February 08, 2019, 05:45:28 AM »
- Which Avast..? (Free/Pro/IS/Premier)
- OS..? (32/64 Bit..? - which SP/Build..?)
- Other security related software installed..?
- Which AV(s) did you use before Avast..?
W8.1 [x64] - Avast PremSec 19.9.2394.B#1 - CC 5.63 - EEK - Firefox ESR 68.3 [NS/AOS/uBO/PB] - Thunderbird 68.3 [EM] - ACP/ASL.BC
Deutschsprachiger Bereich -> Avast Wissenswertes (Downloads, Anleitungen & Infos): https://forum.avast.com/index.php?topic=60523.0

Offline Johto

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Re: WEI fails when Avast is installed
« Reply #4 on: February 08, 2019, 06:52:36 PM »
I decided to test all the versions (Free, Pro, Internet Security and Premier) of Avast you've listed on Windows 7 (32-bit) virtual machine and it looks like the free version of Avast is the only one affected.


- Which Avast..? (Free/Pro/IS/Premier) Avast Free Antivirus v19.2.2364
- OS..? (32/64 Bit..? - which SP/Build..?) Windows 7 (64-bit; 6.1.7601 SP1 Build 7601)
- Other security related software installed..? Windows Firewall?
- Which AV(s) did you use before Avast..? None / Built-in Windows Defender

Online bob3160

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Re: WEI fails when Avast is installed
« Reply #5 on: February 09, 2019, 12:34:53 AM »
I decided to test all the versions (Free, Pro, Internet Security and Premier) of Avast you've listed on Windows 7 (32-bit) virtual machine and it looks like the free version of Avast is the only one affected.


- Which Avast..? (Free/Pro/IS/Premier) Avast Free Antivirus v19.2.2364
- OS..? (32/64 Bit..? - which SP/Build..?) Windows 7 (64-bit; 6.1.7601 SP1 Build 7601)
- Other security related software installed..? Windows Firewall?
- Which AV(s) did you use before Avast..? None / Built-in Windows Defender
Avast free is the only version without a firewall. Could it be your firewall that's causing the problem? ???
Free avast! Security Seminar: https://goo.gl/kh3cqR  -  Important: http://www.organdonor.gov/ -- My Web Site: http://bob3160.strikingly.com/ - Win 10 Pro v1903 64bit, 8 Gig Ram, AvastFree 19.6.xxxx, How to Successfully Install Avast http://goo.gl/VLXdeRepair & Clean Install https://goo.gl/t7aJGq

Offline Johto

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Re: WEI fails when Avast is installed
« Reply #6 on: February 09, 2019, 12:48:26 AM »
I decided to test all the versions (Free, Pro, Internet Security and Premier) of Avast you've listed on Windows 7 (32-bit) virtual machine and it looks like the free version of Avast is the only one affected.


- Which Avast..? (Free/Pro/IS/Premier) Avast Free Antivirus v19.2.2364
- OS..? (32/64 Bit..? - which SP/Build..?) Windows 7 (64-bit; 6.1.7601 SP1 Build 7601)
- Other security related software installed..? Windows Firewall?
- Which AV(s) did you use before Avast..? None / Built-in Windows Defender
Avast free is the only version without a firewall. Could it be your firewall that's causing the problem? ???
Even on a virtual machine with freshly installed OS? Not a chance. And even if it was, then Windows Experience Index would fail when Avast is uninstalled, which isn't happening.

Offline Johto

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Re: WEI fails when Avast is installed
« Reply #7 on: April 16, 2019, 03:26:40 PM »
Any updates on this? As of version 19.4.2374, the issue is still present.

Offline mchain

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Re: WEI fails when Avast is installed
« Reply #8 on: April 18, 2019, 06:04:26 PM »
Was your first test done on a virtual machine?  No issues here with WEI and avast installed on Windows 10 1809.
Windows 10 Home 64-bit 1809 Avast Premier Security version 19.8.2393 (build 19.8.4793.541) UI version 1.0.415.  Current version is back to Avast Internet Security.

Offline Johto

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Re: WEI fails when Avast is installed
« Reply #9 on: April 23, 2019, 05:32:55 PM »
Was your first test done on a virtual machine?  No issues here with WEI and avast installed on Windows 10 1809.
No, I encountered it on my physical computer while trying to determine the Windows Experience Index score again after updating GPU drivers. After a couple of unsuccessful attempts, I started looking for the cause. One of my guesses was an antivirus software, so I tried disabling it, performing a clean boot (so it won't run at startup) but all of it was for nothing – WEI still was failing to complete. Ultimately, I uninstalled Avast and, after a reboot, the test did complete without any error.

And that's where I began to perform more tests on VMs to be sure that my theory is correct before reporting it.


Tested Avast Free Antivirus on Windows Vista, 7, 8, 8.1 and 10, and it looks like this is only happening on Windows 7.


Windows Vista™ Home Premium (6.0, Build 6002) Service Pack 2 (6002.vistasp2_gdr.170209-0600): works fine
Windows 7 Professional 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_rtm.101119-1850): fails
Windows 7 Professional 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_ldr_escrow.190320-1700): fails
Windows 8 Pro 32-bit (6.2, Build 9200) (9200.win8_gdr.151112-0600): works fine
Windows 8.1 Pro 32-bit (6.3, Build 9600) (9600.winblue_ltsb_escrow.190313-1806): works fine
Windows 10 Pro 32-bit (10.0, Build 17763) (17763.rs5_release.180914-1434): works fine

Online bob3160

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Re: WEI fails when Avast is installed
« Reply #10 on: April 23, 2019, 09:09:22 PM »
Reported to Avast.
Free avast! Security Seminar: https://goo.gl/kh3cqR  -  Important: http://www.organdonor.gov/ -- My Web Site: http://bob3160.strikingly.com/ - Win 10 Pro v1903 64bit, 8 Gig Ram, AvastFree 19.6.xxxx, How to Successfully Install Avast http://goo.gl/VLXdeRepair & Clean Install https://goo.gl/t7aJGq

Offline MFDK

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Re: WEI fails when Avast is installed
« Reply #11 on: May 24, 2019, 03:49:42 AM »
Currently can't find info whatever this problem was marked solved or is part of a beta. I am currently facing this problem as well with latest May update. Found several error entries appearing in windows event log, related to WEI (Windows Experience Index), and discovered the problem from there.
WEI is also a thing I know, Windows may occasionally run and automatically in the background.

When avast is removed with the uninstall utility, I can perform the specific affected WinSAT disk performance test successfully. When I later reinstall the avast free installation, it just fails again with error, after the first reboot.

I couldn't replicate the error in WM, with Windows 7 Ultimate though.
WEI isn't any important thing to me however. But hmm yeah, not sure what exactly caused the thing.

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Technical information:

Microsoft Windows 7 Ultimate
Version 6.1.7601 Service Pack 1 Build 7601

Avast Free:
19.5.2378 (build 19.5.4444.495)
Definition version: 190523-4
UI version 1.0.370

Other software:
ZoneAlarm Free Firewall version: 15.4.260.17960
Vsmon version: 15.4.58.17959
Driver version: 15.1.29.17237

Spywareblaster 5.5

Spybot version 2.7.65.0 - Start Center 2.7.65.0131

Malwarebytes Free:
Version: 3.7.1.2839
Component version: 1.0.586
Definition version: 1.0.10686

Offline baddog2019

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Re: WEI fails when Avast is installed
« Reply #12 on: June 15, 2019, 06:59:59 AM »
i can confirm this issue exists. why hasnt avast fixed it?

i have to resort to uninstall avast and installing kaspersky for the time being.

Offline Oleksandr Hrytsiv

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Re: WEI fails when Avast is installed
« Reply #13 on: October 25, 2019, 09:15:13 PM »
Hi to all!
Dear developers of Avast!
I can also confirm this issue with Windows Performance rating on Windows 7 x64. Please, fix it!