I have in the past used sync tools like SyncToy and online storage, like Google Docs, but this is on a whole other level, not to mention remote desktop-like pc control.
This morning, I decided to install in on my Thinkpad x40, which is running Vista Business, but I kept getting an error:
Live Mesh service is unavailable.
Please retry your installation later.
[80072F78] The server returned an invalid or unrecognized response
I rebooted, over and over, but had no success. Later I realized my AV software was still runing. As soon as I disabled it, Live Mesh finished installing and started up with no problem. After a reboot, the AV came up and so did Live Mesh and it has been working OK since.
Just fyi, I'm running Avast! 4.8 Home edition.
Hope this helps, because I found no help google-ing this error.