Avast dont working

[REDACTED]

Cant install avast. Online installer just cant connect to the server "unknown error". I managed to install it with offline installer but i cant update or link it to account cuz the same error.

[Eddy]

Perform a real clean install of avast.

- Remove avast completely
- Remove any pre(vious) installed av('s) completely
- Try to install avast

If that is not working provide details like
Exact version of avast
OS/SP
etc.

[REDACTED]

Deleted everything. Downloaded online installer version 17.4.2294 http://files.avast.com/iavs9x/avast_free_antivirus_setup.exe from nearby topic by MartinZ. Try to install. Get error 41227(0x0000A10B) [Downloader system error].
Os Win7 sp1.

[Eddy]

If I remember correctly that error means that there is a problem downloading from the server.
Give the off-line installer a try.

[REDACTED]

Offline installer works. But i cant update nor activate installed programm. It says only "connection not established".

[Eddy]

Change your DNS to the Google one and try to update.

[REDACTED]

Thanks, it worked. Programm now updated and activated. Should i keep this settings in order for this programm to work? Is it safe for my computer to use this network setting all the time?

[Eddy]

It is safe to keep those settings.
You will not notice any difference between using your providers DNS or the one from Google.

[REDACTED]

Thanks for your help.

[Eddy]

You're welcome.