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 had the same problem with VS2015 (but, strangely, not with VS2013). The advice from @Petrovich1999 did not help me, but updating IE did. Turns out I was still running IE8 on my office workstation (I never use IE), and upgrading to IE11 allowed me to sign into Visual Studio.