This happens from time to time and is highly annoying.
Just booted my machine, couldn't access any websites, didn't matter if I used Chrome, Firefox or Internet Explorer. Couldn't even access my routers webpage.
Killed web shield, nothing.
Killed all shields, nothing.
Avast UI became unresponsive...
Killed both avast services and finally I got my Internet back.
Using Internet Security with Avast firewall.
Versio 2014.9.0.2008 - Windows 7 Enterprise 64bit
Def: 131127-2
Logs: Boot at 07:15 - Starting disabling shields and services: 07:21
Eventlog:
28-11-2013 07:15:39 Maj 6 Min 1 GetVersionEx 6.1 Stored 6.1
28-11-2013 07:15:39 WriteAVASFirewallStatus preVista 0 IsWin8 0 Expired 0 Firewall 1
28-11-2013 07:16:16 The virus definitions have been automatically updated to version 131127-2.
28-11-2013 07:16:20 Maj 6 Min 1 GetVersionEx 6.1 Stored 6.1
28-11-2013 07:16:20 WriteAVASFirewallStatus preVista 0 IsWin8 0 Expired 0 Firewall 1
28-11-2013 07:16:20 Antivirus state 0 updatedSign 1
28-11-2013 07:16:20 UpdateStatus AV failed 8000000a
28-11-2013 07:16:20 Antispyware state 0 updatedSign 1
28-11-2013 07:16:20 Firewall enabled 1
28-11-2013 07:16:20 UpdateStatus firewall failed 8000000a
28-11-2013 07:16:20 RegisterAVASFirewall preVista 0 pszProductName avast! Internet Security pszProductExe C:\Program Files\AVAST Software\Avast\VisthAux.exe firewall 1
28-11-2013 07:16:20 Register Av failed AV failed 8000000a
28-11-2013 07:17:42 Antivirus state 0 updatedSign 1
28-11-2013 07:17:42 Antispyware state 0 updatedSign 1
28-11-2013 07:17:42 Firewall enabled 1
28-11-2013 07:20:59 AAVM - initialization error: Unhandled exception in AavmProviderStop [Inner], WebShield.
28-11-2013 07:21:52 Maj 6 Min 1 GetVersionEx 6.1 Stored 5.0
28-11-2013 07:21:52 RegisterAVASFirewall preVista 0 pszProductName avast! Internet Security pszProductExe C:\Program Files\AVAST Software\Avast\VisthAux.exe firewall 1
28-11-2013 07:21:52 WriteAVASFirewallStatus preVista 0 IsWin8 0 Expired 0 Firewall 1
28-11-2013 07:21:52 Antivirus state 2 updatedSign 1
28-11-2013 07:21:52 Antispyware state 2 updatedSign 1
28-11-2013 07:21:52 Firewall enabled 0
28-11-2013 07:21:52 Maj 6 Min 1 GetVersionEx 6.1 Stored 6.1
28-11-2013 07:21:52 WriteAVASFirewallStatus preVista 0 IsWin8 0 Expired 0 Firewall 1
28-11-2013 07:21:52 Antivirus state 2 updatedSign 1
28-11-2013 07:21:52 Antispyware state 2 updatedSign 1
28-11-2013 07:21:52 Firewall enabled 0