Error BLZBNTBGS80000011, 006, 005 etc - Blizzard app not lanch and solutions do not work

Hi, I got today the Error BLZBNTBGS80000011 and tried to fix according to solutions offered. I have updated windows & drivers, have disabled F-secure, have made new admin account, have uninstalled Blizzard app and everything suggested.

I cannot re-install Blizzard app as I get the same error when I try to do so.

Help please!