So we're 14 working on the Dark Side of the Sun, but the problem is that we have no version or little control on the versions. Everything went fine until all the sub-teams merged together, everyone began working on the same files on a shared folder on Dropbox, so everyone kept overwriting each other and the result is some shit that doesn't even work and we had to rewrite stuff several times. In the end, we didn't even made any progress today. (I warned them about stairs version control!)
So I decided it was enough and use a version control system, despite what our teacher project manager told us about version control systems not being as part of the course. And it's here I ask you advice: which to use? Keep in mind it have to be compatible with Visual Studio, be simple to use (as I don't want to take more than 10 minutes to explain them to each of my colleagues) and don't need to take more than 5 minutes to configure (as the computers have Deep Freeze on them (except for a secondary drive) and we have to install and configure our stuff each time we have to open the computer). I thought about Git or TFS (we have TFS servers at school, dunno if we can use them), what do you think?
