It is your cookies that are outdated, corrupted, or incorrect. I just updated to Windows 10 and for whatever reason, had to reset my live, hotmail, and Outlook passwords. After doing this, I had the "Something went wrong" message anytime I clicked a page
from Microsoft of any kind such as answers, support, Microsoft, etc. On some I could see the pages for answers.microsoft, but when I tried to login, I never got the chance. Just something went wrong again. Now the only way the site can get my login information
if I do not provide it to the page is to refer to cookies.
And in this case, you do not get to login manually, cookies are used and if present, that is all that is used. I opened up the Options for Firefox, Privacy Tab, and clicked "Clear recent history". I had a search box so I could select cookies I want. I entered
Microsoft into the box, thus revealing all of the Microsoft cookies and there were a LOT of them, selected them all, deleted them, and am now able to view these pages again. Hope this helps.