Use a service like Bitly's expansion tool (simply add a + to the end of the link, e.g., bit.ly/xxxxx+ ) to see where the link actually goes before visiting it.
First, let's break down the components.
While the script behind bit.ly windows7txt was generally known in the community as a "clean" activation method (often based on the work of known developer groups), the practice of running scripts from shortened URLs carries inherent risks.