Impossible to sign in with different user account

Sorry for being 3 years late but in a disastrous case where you still have not found the solution, all you have to do is:

1. Go to http://account.microsoft.com
2. If it still has you signed in to a different account, please follow steps 3. and onwards. In the case you were able to log in the account of your choice, hooray! You may disregard this reply then.
3. Click on your profile picture in the top right corner (Figure 1)Figure 1
4. Once clicked, select: "Sign in with a different Microsoft Account" (Figure 2)Figure 2
5. You should now be able to log-in to a different account.

P.S.: Kind of shameful for EricStarker, a community manager, to jump to conclusions.