What do I do if my Microsoft product key is not working?

When encountering issues with a Microsoft product key that is not working, there are several steps that can be taken to resolve the problem. First, it is important to ensure that the product key is being entered correctly. Product keys are case sensitive, and it is easy to make mistakes when typing them in. Double-check for any typographical errors or misplaced characters. If the product key appears to be entered correctly but still does not work, it may be beneficial to confirm that the key is intended for the specific product in question. Some product keys are version specific, meaning they will only work with a particular edition of the software. Verify that the product key corresponds to the version of the Microsoft software being installed. Another common reason for product key issues is that the key may have already been used on a different device. Microsoft product keys are often restricted to specific numbers of installations or devices. If the key has been used previously, it may need to be deactivated on that device before it can be used on a new one. If these steps do not resolve the problem, it may be useful to consult the documentation that came with the product or seek further guidance through the resources available on Microsoft's official web page. There, one can often find troubleshooting guides and additional support options. In cases of persistent issues, checking for any updates or patches for the software may also be helpful, as they could address compatibility problems that affect the activation process.