libcef.dll could not be found error on Windows 7 PC but not on Windows 10 - using assembly resolver.

[Towny]

I created the solution described here https://github.com/cefsharp/CefSharp/issues/1714 

I updated the WPF sample to work with CPUAny. This worked fine on both my Windows 10 (64bit) and Windows 7 (64bit) machines.

I have created a solution similar to Costura.Fody - so that the files required by CefSharp are hald as embedded resources. When the library is initialized the files are written to a temp folder, and an assembly resolver is registered. So far so good and the solution works perfectly on my home PC (Windows 10) - however when running exactly the same binaries on my work PC (Windows 7) - I get an error saying the program can't start because if can't find libcef.dll

Does any one have any ideas why this should work on one PC and not on another?

 I've checked both machines and libcef.dll is not installed in the GAC.

Thanks Towny