>Yesterday, an update of Visual Studio was recommended on my PC. When I tried to run it, after a while it stopped because I had VS projects opened. I was able to close two but not the third one. Tonight, the same notification was done and I wasn't able to close my project. I need to access the location of where I can launch that manually after I would have close all the projects. Anyone knows where it is?

I don't know for sure where the install ends up - but if you know which updates its trying to do you could just goto MS website and download them ??
Maybe its this one??
http://www.microsoft.com/en-us/download/details.aspx?id=36833