As we all know, to fix Windows you reinstall it. Lately, I've done this many times at work and one of the key components we use for sharing documents is OneDrive for Business and SharePoint.
So you download the neat package from portal.office.com (if you're an Office 365 customer) that installs all the office applications - including OneDrive for Business - and off you go, or so you would think.
The first and well known is that since Windows 8 or 8.1 (don't remember exactly), the normal "OneDrive" is installed by default and keeps sticking around in your libraries. This has resulted in much confusion along the lines "why my documents don't show up on this different machine or online?" as people mistakenly put files there.
The second is that when you first launch OneDrive for Business, it asks you with a single text input line what libraries you want to synchronize. Ok, fine, I already know I can input SharePoint paths there and it will synchronize them but the "OneDrive for Business" folder does not show up in your Libraries. You can only either input a path in that dialog of cancel it.
Reboot? No, it still doesn't synchronize your personal folder. It's running in the background and you can see it in notification area but it does squat.
Fine, we have some SharePoint folders we want to synchronize so I open up the dialog again and input a path. It asks for login information in another dialog and I write them and hit the big blue login button but nothing happens. With trial and error I noticed that if I hit the return key it will try logging in but the button does nothing. How fucking nice, Microsoft.
Will it synchronize the SharePoint folder? Of course not! It will give some generic error message that explains nothing.
After exhausting all options I could think of, I closed it from notification area and launched it again manually... IT IMMEDIATELY STARTS SYNCHRONIZING THE PERSONAL FOLDER. And synchronizing SharePoint folders works as well.
WHAT THE ACTUAL FUCK?! Do note that the system was completely rebooted and it showed up in the notification area.