visual studio 2012 incompatiblity and editor package not loading correctly?

I used to use vs 2012 for some month without any problem, today when I want to open my c# project , I got this error message: ``` This program has known compatibility issues Visual Studio 2012 Express for Windows Desktop is incompatible with this version of Windows. ``` when I click Run program I got this error: ``` 'Microsoft.VisualStudio.Editor.Implementation.EditorPackage' package did not load correctly ``` When I continue with this error message, another error message shows: Visual Studio has stopped working. I need to get it work as soon as posible, any idea?