I am downloading Vista RTM now, but my company only has a key for the business edition. I wanted the key for Ultimate. Does anyone know if I will loose any real functionality if I use the business edition? Or should I hold off until I find a Ultimate key? This would be installed on my laptop and I am not in a domain, just a workgroup.

I found this link that I have seen before, http://www.microsoft.com/windowsvista/getready/editions/default.mspx

I guess I don't need all the Media Center stuff on the laptop, but would be nice to have since I use it both for work and personal use. One thing I don't see in the list in the link is Enterprise Edition. I hear it has everything except Media Center. I wonder why it's not listed? Hmmm.... Ah, I found info on the Enterprise Edition here. http://www.microsoft.com/windowsvista/getready/editions/enterprise.mspx

	Home Basic	Home Premium	Business	Ultimate
Most secure Windows ever with Windows Defender and Windows Firewall
Quickly find what you need with Instant Search and Windows Internet Explorer 7
Elegant Windows Aero desktop experience with Windows Flip 3D navigation
Best choice for laptops with enhanced Windows Mobility Center and Tablet PC support
Collaborate and share documents with Windows Meeting Space
Experience photos and entertainment in your living room with Windows Media Center
Enjoy Windows Media Center on TVs throughout your home with Xbox 360™ and other devices
Help protect against hardware failure with advanced business backup features
Business networking and Remote Desktop for easier connectivity
Better protect your data against loss or theft with Windows BitLocker™ Drive Encryption

It is going to be upto you, if you want to use the Drive Encryption and also use it as a Media Centre. The Ultimate is just a little more "beefed" up with the little nice things, but other than that no big difference, but i amsure you will go Ultimate in any case ;)