Explorer may be your problem at work. MagnusTrask has mentioned that he's had similar problems accessing the forum with IE since he's gotten a newer computer. But the weird thing is it doesn't seem to happen with all computers using newer versions of Microsoft browsers. For example, I have a friend who bought a new computer earlier this week, it's running Windows 10 and has Microsoft Edge (which is meant to replace IE) and IE 11, but that computer has no problem whatsoever accessing the forum with Edge or IE. Go figure. But then, there's never been any rhyme or reason when it comes to Microsoft products...
Sorry I don't have better news.