It says my windows is activated, everything works fine
snip...
That's good news!
I think we should clarify something here;
OEM key = legacy computers upto windows 7… the sticker on the bottom of the laptop has a serial key printed on it.
MSDM key = windows 8 and above… the sticker on the bottom of the laptop DOESN'T have a serial key printed on it but there is a hidden copy of the serial stored in the motherboards electronics.
Note: I don't recommend using older key finders like jellybean on new windows laptops because the encryption has changed since and they can report inaccurate serial keys.