I recently installed Visual Studio Ultimate 2013, and when I tried to Sign In to my Microsoft Account, I get the following error:
SP324099: Could not
Have you tried to activate Javascript in Internet explorer? I had the same problem, i opened IE for the first time since i used it to download chrome and it's security method was bassically to disactivate every kind of add-on so just activating "scripting" in Tools/internet options/security/custom settings made me able to log in visual studio again.