Microsoft Live Mesh is being phased out to become Live Sync. If you decide to update to the newer version, you can only have one installed on a machine at a time. for those that have files online through Mesh, they will be available for 6 months after they officially switch over.
Q: What is happening with Live Mesh?
A: Customers wanted to know why we had two services – Windows Live Sync and Live Mesh beta – with similar features. Responding to feedback, we built the next version of Windows Live Sync on Mesh technology – combining the two into one simple, easy-to-use product that brings you the best of both.