Well I've also just googled the problem (and read every post on 18 pages of a thread on a Microsoft forum) and everyone seems to suggest a different solution. Summarising though, some people found that Kasperky's security software seemed to be related to the problem (with fixes including uninstalling and reinstalling or disabling the parental security control). So, if appropriate, try that. Others found that clearing their browser's cache was all that was required (and that method was advocated by some of the forum's moderators):
http://www.wikihow.com/Clear-Your-Browser%27s-Cache
Also check that malware isn't redirecting your internet traffic, resulting in the error message, by installing and running the free version of Malwarebytes Anti-Malware:
https://www.malwarebytes.org/antimalware/
(NB: When installing, take care to deselect the pre-selected option to take a free trial of the 'Premium' version).
Eventually though, ditch Hotmail/Outlook. (I gave up on Hotmail many years ago after being locked out of my accounts, without any reason at all, on several occasions). Get a decent email account!
http://www.gmx.co.uk/