Unable to Sign In to Visual Studio 2013

Question

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

Answer 1

I found out that the same (if not similar) error can happen if ALL cookies are blocked in internet explorer.

If you go to internet explorer's internet options under privacy, make sure that the security level on cookies is set to "Most" or lower. After that I had no issues.