“slmgr -rearm” still exists in Win7
Well, as a lot of people knew, you could run Vista for up to 120days before it forced you to actually activate it by "rearming" the trial period via the command prompt. Many enthusiasts reinstall their system at least this much and never went through with the bother of actually activating, or perhaps they just didn't own quite legal copies? 
Suprisingly MS have left this command into the release build of Windows 7 and as such many users will be able to try the operating system for up to 120 days before they actually buy it…. if that's how you are inclined.
I'd of course reccomend buying the product…rather than somehow installing it before purchase.
