If you use your PC for work, you'll want Windows 7 Professional. It can help you be more productive and protect the critical information you need to work with. Many routine tasks just take a couple of clicks, so you can spend less time setting up projectors, printers, and networks. Enhanced backup options can help you protect your hard work with automatic backups to your home or business network. And with Windows XP Mode, you can use most of your Windows XP programs in Windows 7.

This is 32 disks in 1. It will fit on a single DVD due to packing with a special app. Duplicate files are written only once so it will all fit easily. If you need a genuine key, you will need to buy it from Micro$oft.