This problem suddenly appeared on my domain-connected machine in the past few days (no significant installs or reconfigurations that I can think of). If I lock my computer, when I go to unlock it, I get a "Please wait" message with a spinning wheel. This lasts for 2-3 minutes before I am finally asked for my credentials.
The same happens if I attempt to use Remote Desktop Connection to another machine... 2-3 minutes of "just a moment...", then finally I am asked for my credentials.
Does anyone know of anything that would cause such behaviour (such as a Windows Update) and what I could do to solve it? It's quite unbearable having a mandatory wait period before doing anything.