Slamming your palms against the top of your desk in frustration, you decide it is time to remove your new Windows software and purchase a Windows 7 product key. 2009's Windows 7 is one of the last platforms designed with the desktop computer in mind, rather than newer touchscreen devices. It also offers the ability to pin programs to the task bar and features improved handwriting recognition over previous platforms. You can purchase one of the many unused Windows 7 Professional keys available among the vast inventory on eBay and install it within minutes on your computer. If you have a 64-bit computer system that uses more RAM, you need the Windows 7 Professional 64-bit key. Anyone with less than 4 Gigabytes of RAM on their computers can use the standard 32-bit option. Most modern computers are capable of meeting Windows 7 requirements, such as a 1 Gigahertz processor, at least 1 Gigabyte of RAM, 16 Gigabytes of free hard disk space, and a DirectX 9 graphics card.