I want my PC optimized, so I disable unnecessary features and services. However, I cannot disable Windows Defender, which gets turned on by itself, even if you disable it via Settings. I even disabled Security Center service, but that did not help. Widows Firewall is the only security feature I want/need (and it doesn't even require Security Center service to run!). The 2nd issue is that Microsoft's official tool (.diagcab file) is not working properly. I have NVidia drivers ready to install, even though I used that tool to hide NVidia drivers and prevent them from being downloaded. Is there a stronger fix for this? I found a script file that supposedly works better, but I am not sure if I want to execute it... Here's the script: Is it worth a try?