Hello again, 1 - Yes, it is now version (M) - 20.0.14.1085(m) - I written my post just after reinstalling it, so it may have been updated 3 - I have an online-installer dated on 07/2020 downloaded from “https://www.kaspersky.pl/do-pobrania/thank-you/kaspersky-free” Every time i run it, it download main install files so I assumed it downloads current versions. After installation it updates itself in an hour or so. *Offtopic - I don’t like online installers (any, not only KSK/KAV), never know what it downloads and often it downloads adware/scamware I can try to download fresh copy of online-installer and install it again. Although, like I said before, it is not an Antivirus problem - when only KAV (without KSK) is installed it works well. When I install KSK it goes wrong. Now (when posting) I uninstalled KAV completely and left Windows without any AV - once again khanacademy does not work well. So, IMHO - AV is not a problem here. Definitely KSK. EDIT: (18:54) I downloaded and installed Kaspersky Security Cloud Free version 21.2.16.590. After restart still have problems with khanacademy. *Offtopic - online-installer downloaded and installed “Kaspersky VPN” without my permission. I sure disable it and uninstall, if possible. That is why I don’t like that kind of installers and always trying to avoid it.