I'm running Win 7. I use TorGuard VPN. I'm connected through a wired LAN. My connection is High Speed cable and works fine. My VPN connection is normally good - maybe a second or two slower than non-VPn but good speeds.
It was all running fine until yesterday when I uninstalled Avast antivirus to install Avira. My VPN connection then came to a halt. My non-VPN connection was still fine. With VPN connected, pages that would load took anywhere form 30 seconds to a minute or longer. I got timeouts where most pages wouldn't load. I got error messages trying to load pages, like:
www.speedtest.net’s server DNS address could not be found. Search Google for speed test net. ERR_NAME_NOT_RESOLVED
ww.google.ca unexpectedly closed the connection. Try: Reloading the page Checking the connection Checking the proxy and the firewall
The VPN provider suggested manually setting the IPv4 DNS to a private address they gave me. That resolved it for a short time, but the DNS kept resetting back to Obtain Automatically. I kept manually inputting it and it kept resetting. I then tried the Google DNS address and it still reset back to Obtain Automatically.
I have seen posts related to this problem but the reverse of mine, where Obtain Automatically DNS settings were directed to a specific DNS, as happens with some viruses or attacks. I scanned and came up clean using Malwarebytes, Hitman Pro, Adwcleaner, Hijack This, Avira and SUPERAntispyware.
I decided to uninstall Avira and see if that changed things. It didn't. My non-VPN connection remained fine but the VPN was at a crawl or dead stop. Inputted DNS addresses would revert to Obtain Automatically.
I decided to re-install AVASt and see what happened. And the problem was fixed. My VPN connection was back to working normally with pages loading fast and fine. Somehow Avast is related to this problems as it correlates to the problem occurring and resolving. Avast scan also showed clean. What is Avast doing to my IPv4 DNS settings that would cause them to fail on the VPN, when Avast is uninstalled? It's like Avast has hijacked my settings,a dn the VPN now only works when AVAST is re-installed.