Using unofficial activation methods such as
kmspico activator for windows 11. KMSpico is a popular tool for activating Windows and Office without an official product key. It works by emulating Microsoft's activation server and temporarily activating programs. But here it's important to realize that using such methods is illegal and can lead to undesirable consequences, including legal problems and vulnerability of your system to malware. Therefore, I would recommend using only legal activation methods. If you can't find your product key, it may be worth considering buying a new key or a Microsoft 365 subscription, which gives you access to the latest versions of Office on a subscription basis and doesn't require you to enter a product key for each installation. This may be a more convenient and secure solution.