Avast blocks webbrowser after few minutes

[REDACTED]

Hey,

I have apparently an issue with my Avast Free Antivirus. About once a week (give or take) my webbrowser appears unable to load any website. I am using firefox, but the same is happening with IE. I just browse the internet for some time (mostly under 15 mins), then it stops loading any site. It's doesnt seem to be an issue with my internet, since Steam works fine, as do other online games. My tablet and smartphone are working just fine as well. Why do I think it's avast? Well, as I turned it off the last three times it occurred, the issue was solved. Not entirely, since Avast refused to restart again, so I had to restart the PC, but that's a minor problem. For more information: I am using Win 7 and have Comodo Firewall, Avast tells me I have the current version.

It's really annoying, I hope someone can help me with this issue  Fur further information, just ask!

Lars

(and it just happend again...deactivating avast solved it, but that can't really be the final solution)

[Asyn]

- Which Avast..? (Free/Pro/IS/Premier)
- Which version..?
- OS..? (32/64 Bit..? - which SP..?)
- Other security related software installed..?
- Which AV(s) did you use before Avast..?

[bob3160]

Maybe you need to examine your firewall and if it's interfering with Avast

[Staticguy]

1) What previous antivirus did you use? Did you use it's uninstaller utility after you have uninstalled it via add/remove?
2) Did you try doing a repair of avast via add/remove?

[REDACTED]

- Which Avast..? (Free/Pro/IS/Premier)
- Which version..?
- OS..? (32/64 Bit..? - which SP..?)
- Other security related software installed..?
- Which AV(s) did you use before Avast..?

-Avast Free Antivirus
-2015.10.2.2215
- Win 7 64 bit, SP1
- Comodo Firewall
- I only use and have used Avast

2) Did you try doing a repair of avast via add/remove?
No I didn't, trying it now (kind of thought an update was sufficent.) Though results might now be visible right now, it happens quite randomly.

Maybe you need to examine your firewall and if it's interfering with Avast

Hmm maybe..but as I said, the issue is solved when I deactivate Avast. I have tried it with my firewall of course, but the issue persisted.

Thanks for the quick replies!

[Asyn]

If you've still problems after the repair, try a clean reinstall:

1. Download Avast Free Antivirus: https://files.avast.com/iavs9x/avast_free_antivirus_setup.exe
2. Follow instructions: https://www.avast.com/uninstall-utility (Run this tool for all prior installed Avast versions..!!)
3. Reinstall Avast with the downloaded installer from point 1.
4. Reboot.

[REDACTED]

Okay, did the repair, let's see what happens.

Regarding the clean re-install, I've heard that the firewall should be deactivated while installing an anitvirus due to complications in the registry (or something like that). Is this something I should look out for, or can I just install it?

[Asyn]

Regarding the clean re-install, I've heard that the firewall should be deactivated while installing an anitvirus due to complications in the registry (or something like that). Is this something I should look out for, or can I just install it?

Never had any problems with Comodo.

[REDACTED]

Check your event log and see if DNS clients events are present, error 1014

[REDACTED]

hm no, there are some '1014's in it, but no error..

right before the issue occurred today there's this:

30.03.2015   14:40:13   Maj 6 Min 1 GetVersionEx 6.1 Stored 6.1
30.03.2015   14:40:13   [00000944] WriteAVASFirewallStat SignUpToDate 1 preVis0 IsWin80 ExpPrg 0 Fw 0 Fs 0
30.03.2015   14:40:13   [00000944] WaitForWscService( 840 ) -> true, SCM OK wsc OK err 0
30.03.2015   14:40:13   [00000944] UpdateStatus AV OK status 2 sign 1
30.03.2015   14:40:13   [00000944] WaitForWscService( 840 ) -> true, SCM OK wsc OK err 0
30.03.2015   14:40:13   [00000944] UpdateStatus AS OK status 2 sign 1

[REDACTED]

In your "Windows" event logs under system... it will say event ID 1014 DNS Clent Event

[REDACTED]

Hm, so repairing avast didn't help.

In your "Windows" event logs under system... it will say event ID 1014 DNS Clent Event

There are few occasions when it says event 1014, but not ever in relation to the internet block 

I'm trying the clean reinstall tomorrow I think and will keep you posted.

[Pondus]

Tried this?   
Delete all avast rules in comodo, restart computer, when comodo ask create new rules

[REDACTED]

Okay, clean re-install didn't help...

Delete all avast rules in comodo, restart computer, when comodo ask create new rules

Going to try this now.

[Asyn]

OK, report back.