Microsoft has unveiled some details on the upgrade and retail pricing of Windows 7, the new version of Windows that’s due for release this October.

If you’re planning to buy a computer with Vista soon, there’s a good chance the upgrade program will cover you: it’s in effect from June 26, 2009 through January 31, 2010. But pricing and options depend on when you order a new PC (or a retail copy of Windows 7) and, in the case of a new computer, the brand and model.

Bottom line: If you’re buying a new computer with Vista, check directly with the manufacturer to find out if they support the upgrade program and what the upgrade to Windows 7 will cost you.

Microsoft has posted Windows 7 retail pricing on their Windows Blog.

The site estimates these retail prices: