So, yesterday, the wife was on the puter and had to reboot for updates that MS released (IE9 RC and Silverlight 4.0.60129.0). She logged in and continued her day.
This morning, I boot up and log in only to find that my desktop had gone away. Instead of a "welcome" message while logging in, it says "Preparing your desktop" and gives me a brand new desktop, like I had just installed this user.
A simple restore to yesterday morning, pre-updates, solved the probs. I have my desktop back. And, I've reinstalled the updates, one at a time. No more issues.
Anyone else run into a prob like this?