"I'm using Windows 8.1 update 1 on a dual monitor PC and it works fine for me. I don't see where you're having issues except for maybe just looking at it and not giving it a fair try."
I find Windows 8 is absolutely fine if I'm only doing basic 'user' type stuff - and my most regularly used applications are pinned to the task bar or on the desktop, so I rarely have to put up with the jarring UI change just to launch something. By basic user type stuff I mean loading documents into office type software, running accounts software, etc.
Sometimes, though, Windows 8 decides to be an utter, utter prick. And here are a couple of examples which are barely above basic user type stuff:
Example 1: I usually edit my websites on a different computer, but sometimes I might need to on the laptop when I'm not at home, so they are in a folder on the Windows 8 laptop which is shared across the network. One of those sites has four directories of images, and within each of those is a directory of thumbnails. Each of those directories of thumbnails is completely invisible to any computer on the network. Only the Windows 8 computer can see them. Probably a UAC issue, but I've yet to resolve it - mainly because, so far, I haven't needed to access those folders across the network; it's just something I've noticed. But Windows 8 is a prick.
Example 2: Someone updated a manual for me and put it on their own website, sending me a direct link by email to download it. I read my email on the Windows 8 laptop, so I downloaded it on that machine, and put the zip file in another shared directory. I can open access that zip file from Windows - so I know it's fine. When attempting to move, copy or open that zip from another computer I get an access violation. Again, probably a UAC issue, and one I've yet to resolve. Instead, after spending a huge amount of time trying, and failing, I ended up using a memory stick to transfer the file between two networked computers. Windows 8 is a prick.
Just to summarise: You know that Windows 8? It's a prick.