ue4Editor-unrealed.dll error

After accidentally editing an engine header and reverting my changes, Visual Studio detected this change and decided to rebuild the engine. After the rebuild started I did modify some source code in my C++ project and I ended up with this error :

ue4Editor-unrealed.dll is either not designed to run on windows or it contains an error. Try installing the program again using the original installation media or contact your system administrator or the software vendor for support. Error status 0xc0000130.

I can only assume the DLL wasn’t written correctly or had an error. I’m going to do a full rebuild next but I was wondering if there’s a different fix since a full rebuild takes me like 40 minutes…

Question 2 : is there a way to prevent the engine to be rebuilt ? Like saying hey, even if I do modify its headers I don’t want it to ever rebuild ?