Click the start menu (then click Run if using Windows XP) and type regedit.

Home / General Software / Microsoft Office / Change or reset the product key for Office 2003 or 2007 Close all open Office programs.Microsoft is known as one of the biggest corporations for developing operating systems and office programs. It is the most commonly used software application. Microsoft Office Professional Plus 2016 Product Key does need any introduction.Enter your product key for the edition you are upgrading to, whether it is Pro or Enterprise and wait while the product key verified. Click Yes if User Account Control comes up. Select About then Change product key or upgrade your edition of Windows. Once you have your Windows 10 key ready select System. Microsoft Windows XP Pro Upgrade w/ Service Pack 2 Integrated SN:CD87T-HFP4C-V7X7H-8VY68-W7D7M CD NR 17 256.