Have COA but dont know OS version it's for

[eudaly]

Hello,
I have a laptop whose COA number can be read but the OS type cannot. How can I determine which OEM disk to buy?

 

[JDFan]

Contact Microsoft support and they should be able to tell you from the COA number which product it is for.

 

[eudaly]

I tried the MS support site and wasn't able to ask the question of anything but the robot which tried to give me advise about MS Word.

Anyone have a link to a real support person?