Known add-ons with this issue are Tissue, RetopoFlow, and XNALara/XPS Import/Export. I am running Blender 2.79 on Windows 10 64-bit. I have also experienced this issue in 2.78, but not in 2.77.
Edit: This also occurs when I try to switch themes.
Try the following:
The most likely cause for that is mistmatch between versions of blender and some DLL used by the addon (x86/x64). The other possible reason is that the DLL addon is not compiled for Windows at all. I assume your Blender is most likely x64, so you might need to check if the addon is available in x64 distribution as well.
Can't say more without closely looking at the addon itself.