Other licensing language spells out additional legal restrictions.

"You may not use it in a live operating environment, a staging or production environment, or with data that has not been sufficiently backed up," reads a on the TechNet site. "You may not use the evaluation software for software development or in an application development environment."

On the plus side, a TechNet Standard subscription also lets you download and install other Microsoft operating systems and programs, including Windows 7, Office 2010, Office for Mac 2011 Home and Business, and when it ships, . The two-keys-each rule applies for those as well.

Gregg Keizer covers Microsoft, security issues, Apple, Web browsers and general technology breaking news for Computerworld. Follow Gregg on Twitter at , on or subscribe to . His email address is .

See .