1

I am running AIS on Win 7 64 with 4 GB RAM.

I have done full scan & its been 2 weeks since install.

I have only AIS as autostart program i.e msconfig-startup- only AIS is checked.

I have noticed boot time have increased, not very long but quite noticeable compared to any other security software I have used in the past. My last software was Bitdefender free & I uninstalled it & also used Bd free cleanup tool.

I have Win FW disabled.

Boot time with AIS is app 2-3 mins. Previously it was always around 1 min.

And also once desktop is reached, Avast takes quite a few secs i.e app 20-40 secs to appear in task tray & till that time system doesn’t respond smoothly i.e anything clicked either appears late or appears only after Avast is loaded in the task tray.

I have also noticed that with AIS install I get page cannot be displayed prob in browser & sometimes page keeps loading & have to refresh & it works, though not often but time to time. I dont have this prob with AIS uninstalled. I keep HTTPS on Webshield disabled. I guess SecureDNS is the prob coz the page cannot be displayed mention something like DNS probe was not finished.

I have tried completely uninstalling Avast 3 times including Avast clear tool but boot time & browser prob remains.

I tried disabling SecureDNS & FW & think page cannot be displayed prob is due to SecureDNS & page keeps loading is due to both SDNS & FW coz the prob disappears only when both are disabled.

Does SecureDNS enabled means it uses Avast DNS instead of system DNS?

I use Adblock Plus with the default i.e only 1 category i.e ads only i.e Easy List, no other addons. Tried disabling ABP too but the prob remains.

No other security software.

Any info?

2
  • Which version of AIS…?
  • Which AV(s) did you use before Avast…?
3

Latest AIS .2218

Bd free from quite a long time & was uninstalled & also ran Bd free uninstall clear tool.

4

First, be sure to get rid of all remnants of your prior installed AV(s)…!!
→ https://www.avast.com/faq.php?article=AVKB11

Then:

  1. Download Avast Internet Security: https://files.avast.com/iavs9x/avast_internet_security_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.
5

I have already done everything.
From quite a long time I have used only Avast free/ Comodo IS & Bd free on this system. I have uninstalled them properly & completely with uninstall tool too.

6

Attach your basic diagnostic logs from FRST.
Instructions: https://forum.avast.com/index.php?topic=53253.0

7

Its strange but disabling SecureDNS solved the browsing prob.
From yesterday, yet dont have browsing prob.

May be previously I disabled SecureDNS 10 mins only so after 10 mins prob was back.

From yesterday I have disabled SecureDNS permanently & no browsing probs yet.
Boot prob too seems improving with each passing day.

If any query will post here.

But have to disable SecureDNS & thats bad.

And one point, when I keep SecureDNS enabled, I have noticed that sometimes GUI shows something like SecureDNS cannot connect to this network & after few secs everything fine. I have noticed this quite a few times.

8

Submit a ticket: https://support.avast.com/Tickets/Submit