Before you buy a Windows 10 Professional OEM key, know that this version of Windows is only compatible with newly installed versions of Windows. If you purchase this edition, you will be required to r ще→einstall Windows completely. This product is suitable for both 32-bit and 64-bit versions of Windows. Follow these instructions to install the software on your computer. Please call the automated phone system if you have difficulty activating the product. Purchase a Windows 10 Professional OEM key and boost your productivity to new heights. This professional operating system includes all of the features found in Windows 10 Home, plus a slew of business-specific features and settings.