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I have my CD, but lost my activation code. What can I do to avoid buying a new license

Solution
If this is for WIndows 8.1 or 10, and using an MS account (linked to an email address), you might not have to enter any code anyway. (In any event, a large number of products can pull the product key from an existing valid/legal install; portable UltraVirusKiller (SystemInfo tab) makes it as simple as can be...
If this is for WIndows 8.1 or 10, and using an MS account (linked to an email address), you might not have to enter any code anyway. (In any event, a large number of products can pull the product key from an existing valid/legal install; portable UltraVirusKiller (SystemInfo tab) makes it as simple as can be...
 
Solution