Crt files? I don't understand what you mean by that. 12.1 updates in a different manner, it doesn't use DAT's at all.
Also the MVT servers are acting up so it is giving incorrect results in some cases.
This is what mine says for anti-virus at the moment so you can compare: (click image to enlarge if necessary)
Do you mean digital certificates are showing as missing? I wouldn't rely on what MVT says at the moment for reasons I already stated.
You might want to also check Windows Updates for anything there.
CRT files are digital certificates. The .crt suffix is usually found on (*)nix systems. The more normal suffix in Windows is .cer