Hi, I am Dave, I will help you with this.
Cracked games are usually wrapped with malware and can cause a ransomware attack, that is why they ask you to disable Defender, you should never do that.
Download this file:
https://1drv.ms/u/s!AvS3D6xKILoj335BRsl0Uomm1RD...
Then right click that file and select 'Run as Administrator'.
When that completes, restart (not shut down) your PC and then check if Windows Security is working correctly.
If not, your best option is to either reset or clean install Windows to ensure your system is malware free.