when are youn going to fix the connection problem, it’s getting a lot worse!

"Access denied, youd don't have permission to access," or "invalid security certificate" pops up more and more. I will get connected and then I get "we cannot connect to outlook right now try again later", or somethingvery similar. I've tried everything imaginable, totlly cleaned my computer, ensured that the time and date were right and numerous other things that were posted on microsoft web site and this continues to happen, not only on my Firefox, but also internet explorer. HELP!