With Windows 7 Professional, fewer walls stand between you and your success. You can run many Windows XP* productivity programs in Windows XP Mode and recover data easily with automatic backups to your home or business network. You can also connect to company networks effortlessly and more securely with Domain Join. With all the exciting entertainment features of Windows Home Premium, its a great choice for home and for business. 32-bit or 64-bit? For your convenience, every copy of Windows 7 Professional includes both 32-bit and 64-bit discs. For more information on installing Windows 7, browsing the internet with Windows 7 and more, take a look at our Frequently Asked Questions or join Microsoft help on Twitter at http://twitter.com/MicrosoftHelps. Is Windows 7 Professional right for you? Be sure with our Windows 7 comparison chart.
1 gigahertz (GHz) or faster 32-bit (x86) or 64-bit (x64) processor
1 gigabyte (GB) RAM (32-bit) or 2 GB RAM (64-bit)
16 GB available hard disk space (32-bit) or 20 GB (64-bit)