Avast Webshield blocking email and web access to ALL sites

system · 2017-04-02T17:30:38.000Z

Avast Web shield (webshield) is blocking all access to all websites via all browsers (IE, Edge, Chrome) on Windows 10 and email program (Outlook and EmClient). This problem start last night (4/1) around 7pm CST. I’ve been using Avast Free for years and it had been working on this computer. Finally isolated the block to Avast Web Shield. As soon I disable it, all access returns. So, I’m assuming there was some update yesterday evening that caused this. I’m on v17.2.2288, defs: 170402-0, def#: 6.275.534. Any help on how to resolve so I can re-enable webshield would be appreciated.

Asyn · 2017-04-02T17:59:27.000Z

Update to the latest version (17.3.2291): https://forum.avast.com/index.php?topic=199715.0

system · 2017-04-03T11:26:43.000Z

Thanks Asyn! Upgrading worked!

Asyn · 2017-04-03T11:34:22.000Z

You’re welcome.

system · 2017-05-11T00:07:45.000Z

Hi I have Avast 2017 latest version (free) on Windows 7 and like other posts it is blocking all internet traffic. No error messages or warnings just no access to internet sites but internet connectivity is fine. I have tried the repair option in Uninstall options and tried turning off the HTTPS scan option but nothing works unless I disable the Web Shield option. Any suggestions?
Thanks
Simmo

system · 2017-05-11T03:02:57.000Z

I would like to confirm this problem. Running windows 10. Avast Version 17.4.2294. For some avast is just blocking all internet traffic for no reason starting this morning. I have automatic updates on and it says it already updated.

Eddy · 2017-05-11T10:56:46.000Z

A clean installation of the latest version should solve it.

Zdenek · 2017-05-11T14:19:09.000Z

Who is affected, please provide file version information for these files

“c:\Program Files\AVAST Software\Avast\aswStreamFilter.dll”

c:\Windows\System32\drivers\aswStm.sys

To obtain the information, please just click on the file by right mouse and then select properties and Details Tab.

Provide screenshot or value of the FileVersion line.

Additionally, when you perform reboot of the computer, the problem persist or not ?

Sorry for inconvenience and thank you so much.

FilipBraun · 2017-05-12T18:28:53.000Z

Hello everyone,

We were able to identify and fix the internet connectivity issue that occurred after the latest Avast 17.4 update.

The fix is being distributed via a micro-update to Avast Web Shield.

To download the fix, please follow these steps:

[ol]- Turn OFF Avast Web Shield (internet connectivity will start working)

In UI go to Protection > Antivirus and turn Web Shield OFF or
Right-click the Avast tray icon > Avast shields control > Disable permanently (to turn OFF all shields)
Go to your Avast installation folder - usually “C:\Program Files\AVAST Software\Avast”
Run (double-click) AvEmUpdate.exe and confirm the UAC prompt
Avast will now silently apply the fix
Wait for about 5 minutes
Restart your computer
Turn Web Shield (or all shields) back ON
You are now again connected to the internet and protected[/ol]

Thank you for your patience and your help in resolving this issue.

Sincere apologies,
Avast team

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