ProduKey

ProduKey is a free key finder software by NirSoft. The software is designed to retrieve ProductID and CD-Key of old software that have been legally purchased but they were lost for some reason. Losing them physically happens as time passes and users have to acquire copies of ProductID and CD-Key for their convenience. ProductIDs and CD-Keys are required for reinstalling software from one computer to another, otherwise they are prompted to purchase a new software. The software works for reinstalling Microsoft Office, Windows OS, Exchange Servers and SQL Servers. After users activate command-line options, they can finally view their  ProductID, CD-Key and Computer Name.