Microsoft has not launched the retail version of Office 2010, but they've put Office 2010 Professional Plus free trial for 60 days on their TechNet website. When you download the installer needs 650MB, Microsoft offers you an activation code is used in 60 days. You can see all this free time for additional six months by not applying the activation code but in its place, you would use a technique called "rearm”.
Like Windows 7, Office 2010 will run up to 30 days without activation code 25 characters. Though, while this time out; the messages will show with more and more thick density on screen to remind you. But by calling a rearm, you can reset the time without using the activation code of 30 additional days.
Office 2010 allows you rearm to five times, as well as 2-month trial and 30-day period without activation code using the original, you can run the software for free in eight months.