Visual Studio 2015 not finding Visual studio 2010

Question

My visual studio 2015 cannot build 2010 platform toolsets. It says:

The build tools for Visual Studio 2010 (v100) cannot be found. To build using the Visual Studio 2015 (v140) build tools, either click the Project menu or right-click the solution, and then select "Upgrade Solution...". Install Visual Studio 2010 (v100) to build using the Visual Studio 2010 (v100) build tools.

I do not want to upgrade my project or switch the toolset. I have visual studio 2010 installed. It builds the 2012 projects inside visual studio 2015 fine. 2012 also finds the 2010 build tools and builds 2010 projects fine.

Is there a visual studio setting where I can point it to the Visual Studio 2010 directory so that it correctly finds the build tools?

I have tried reinstalling 2010, 2012 and 2015 in that order.

tldr; Visual studio 2015 wont build 2010 projects even though I have visual 2010 installed.

Answer 1

Install this service pack: https://www.visualstudio.com/news/vs2015-update2-vs

Fixed the issue for me. Released March 3, 2016 so it was unavailable at the time of posting.