In a rare move, Microsoft is now offering free unlimited installation and compatibility support for Windows Vista, but only for Service Pack 1 (SP1). This even includes FREE phone support!

So fear not upgrading or installing Vista SP1 - Microsoft's got your back!

Note: Chat and e-mail support is available only in the United States and Canada.

This support for SP1 is valid until March 18, 2009.

Here's a screenshot of the Microsoft Help & Support page: