With Windows 7 Ultimate, fewer walls stand between you and 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. With all the exciting entertainment features of Windows Home Premium, it's a great choice or home and for business.
Windows XP Mode requires an additional 1GB of RAM, an additional 15GB of available disk space, and a processor capable of hardware virtualization, with Intel-VT or AMD-V turned on.