It is the upgraded version of the Windows 8 operating system and has been enhanced in many aspects with newly implemented features. Windows 8.1 Professional is available in both 32-bit and 64-bit versions and delivers high performance for both business and professional users. *Get your original license at the right price Windows 8.1 Professional for professionals and businesses You will receive your original license via email immediately after purchase, a link to download the official ISO from the Microsoft website, and all the instructions for quick and easy activation. Secure payments provide full assurance to the buyer. Purchase Windows 8.1 Professional and get a 100% original license directly activated by the user with the official Microsoft ISO file.