Trying to run CSGO FACEIT Anti-Cheat gives "Your system is missing important Windows security updates." error message. Is it possible to somehow install those security updates manually without too much hassle?
Windows Update doesn't work for me, says it encounters an error: "We couldn't connect to the update service. We'll try again later, or you can check now. If it still doesn't work, make sure you're connected to the Internet." I tried running windows update troubleshooter, changing DNS server, disabling proxy, restarting windows update service, safe mode with network, nothing helped. I'm thinking maybe i used one of the windows 10 debloat tools like ShutUP10 to disable the windows update somehow.
You don't need any debloat tool. You need to download the original installation media and do a clean install and everything will work.
So there is no other fix for broken Windows Update besides doing a clean install? Or doing a clean install will install recent Windows security updates? And i will have to do a clean install every time there is a new security update?
Of course, it is not always necessary to do a new installation, if you have maintained and clean windows, it will also install updates. But you don't have that maintained system, You have only damaged system. Of course, you can try to repair, but now, ie in this case, a clean installation is the fastest and surest way to fix all the errors at once. Takes only couple hours. You yourself know what you are doing or what path you are choosing. If you have a backup from when everything was fine, it helps a lot. Use it or run windows reset.
Get yourself a working ISO and perform an inplace/replair upgrade by mounting the ISO and run setup.exe. Anti-cheat tools seem to break activation stuff too, seen a few of them on the MAS discord server.
I ran the setup.exe and installed win 10 with keeping personal files option from mounted Anti-Cheat and Windows Update still gives the same errors.