Are you sure that the product key is correct? Sometimes, one hasn't entered the correct digits and/or letters for the simple reason that they may be difficult to read. You are correct that you won't get any assistance from Microsoft, because Office 2007 is out of support. Stefan Blom. Office Apps & Services (Word) MVP since 2005. Click Options. (For example, in Word, you would click Word Options.) Click Resources. On the Activate Microsoft Office line, click Activate. Click I want to activate the software by telephone, and then click Next. Click the drop-down menu, and then select the country or region that you are from. The Product Activation Center telephone number is Go to the Microsoft Website. Go to Services and Subscriptions. Scroll to find the Key. Copy the Key to transfer to your new installation. Don’t lose your key. Your Microsoft Office Product Key is a series of 25 letters and numbers that must be entered when software is activated on your devices. This Key certifies that the software is an I have a trial version of MS office Suite 2007 on my laptop. I uninstalled it and installed Office XP. When I did my Windows update the Office 2007 downloaded automatically. Now Office 2007 prompts me for a 25-character Product Key. I can absolutely find it nowhere. My search on my machine and on the internet just ends me up where I have started. If you are getting a prompt to type in a Product Key when opening a Microsoft Office program, it is likely the trial period is over and you'll need to purchase a license (product key) for Microsoft Office. The product key affixed to your computer is for Windows Vista (the operating system) and not for Microsoft Office. Please review the I called tech support and they told me to try the by phone option, and nothing happened when I clicked it. No asking for a product key or anything. How do I reactivate my software with my existing product key? Windows 8.1 (64 bit) Microsoft Office 2007 (Word specifically here) Have Product Key Answer. The 25 character product key is your proof of ownership of Office. Depending on the type of Office license you bought you may or may not be able to transfer it to a new computer. If you bought a boxed CD or '2-computer' or '3-computer' or "FPP" type license you can transfer it. If you bought a "Product Key Card" or '1-computer' license With Microsoft 365 subscription plans you can get premium versions of Office apps such as Word, Excel, PowerPoint, Outlook, Publisher, and Access (Publisher and Access are available on PC only). Microsoft 365 works across multiple devices, and monthly updates are made available to help ensure your apps are always current. Office 2010 suites include applications such as Word, Excel, PowerPoint, and Outlook. They’re available as a one-time purchase for use on a single PC. Microsoft 365 plans include premium versions of these applications plus other services that are enabled over the Internet, including online storage with OneDrive and Skype minutes for home use. Click the Microsoft Office Button > Options > Activate Microsoft Office. To activate from all other Office products: Click Help > Activate Product. For help activating Office 2007, contact support. See Also Office 2010 Install Office on your PC or Mac Need more help? Want more options? Discover Community ofUd.