2022-06-16 UKV (Ultra Virus Killer) under system info will show the key
Open command prompt cmd
wmic path SoftwareLicensingService get OA3xOriginalProductKey
I like Nirsoft's program for this but fighting the antivirus over it irritating so why bother.
This one looks good PID Key Checker
Or this may be good enough and you don't need anything but cmd
Windows Product Key
check expiration
slmgr /xpr
type and partial key
slmgr /dli
same but more info
slmgr /dlv
Retrive key
wmic path softwareLicensingService get OA3xOriginalProductKey