For "Please make sure PIN is not set in Windows sign-in options and manually disable Hyper-V", remove the PIN and password from Windows sign-in. Then temporarily disable virtualization in the BIOS, run the PowerShell commands from the guide and turn virtualization back on.
"Failed to map memory" means you are short on RAM, and you need 12 GB or more. Clear out startup programs and reboot, and clean up autostart with AutoRuns if needed. If the PC physically has less, the vendor recommends a refund.
Did the loader close silently with no error? Then the libraries from the guide are not installed.
Menu visible but not clickable, or opening only every other time? Steam has to run without admin rights. Keep only the NVIDIA or AMD overlay, and if EA App is installed, turn its overlay off.
For "Make sure all antiviruses are disabled", uninstall third-party antiviruses and turn off real-time protection along with SmartScreen. For Windows 11 the guide has reg files Turn_ON and Turn_OFF, which you run one after the other, rebooting in between.
"Please enable Intel VT-X / AMD-V in the BIOS" asks you to turn on virtualization, which AMD boards often call SVM mode. "Please disable secure boot in the BIOS" means switching Secure Boot off. And "AES instruction set is not supported" has no fix: the CPU lacks AES, and a refund is the only option.
AMD cards sometimes throw a library error: install fresh libraries, and if that does not help, replace the DLL in the AMD Software folder as the guide describes. Menu gone after a COD patch? Wait for the build update, which the product status will show, and verify the game files.
A blue screen or a ban during play goes to the support chat: describe what happened and attach a screenshot of the error.