VS2012 not loading project -Unable to read project file.

I tried loading a solution I’d been working on at home onto my work machine and one of the projects failed to load with the following error : Unable to read the project file “blah.vcxproj(150,3): The imported project C:\Program Files(x86)\MSBuild\Microsoft\WindowsPhone\v7.0\Microsoft.Cpp.Windows Phone.7.0.targets” was not found. This had me going around in circles and there was a…