Is by any chance W8.1 incompatible with IIS?
Even though IIS 8.0 express is installed, I can't open any VS project that uses it, even creating a new one yields an error... Tried on 2 different machines, both clean installs. On Windows 8 simply installing VS is all I need to do to get IIS up and running, on *.1 I had to enable it from the "Turn Features on and Off" but even that didn't worked...
Also, I don't get why you are offered to restore to a previous backup or set up as a new Pc when reinstalling 8.1... All the things you would expect that are not synced between devices*, but that should be saved on the backup are either not saved, or not restored... And you have to set them up just like you would from a blank install...
*Stuff like always showing all taskbar notification icons, view options on Windows Explorer, that I want to sync email from more than 2 weeks or even my email signature on the mail app (BTW, why those options are not synced with your profile too? Specially the signature), paired Bluetooth devices, game save data (the only ones that were restored were the ones that already sync between profiles), and app save data (login info, and actual content from the app)...
Does this need app support?