In order to see which is your product license key, please open Bitdefender and click on the number of days left (in the lower part of the window). A new window will pop up - you'll find here your license key.
What Operating System do I have?
In order to find out what operating system do you have, please click on Start and right-click on My Computer. Then choose Properties and there you will be able to see what operating system you have.
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