visual-studioIf you are using Visual Studio, that means that from time to time after you uninstall a program, an application or a game, some .dll files that are important for a proper Visual Studio work may be deleted, for example Msvcr90.dll. If you are going to search on forums how to fix the problem, every person will give you a different advice. From my point of view you may try two of them.
The easiest way is to download the Msvcr90.dll file and move it to the program directory missing the file. If you can not find the folder, you cab try to move it to system32 folder. The second possibility is to delete your current visual studio version and install a new one.
Anyway you can easily DOWNLOAD the Msvcr90.dll file for free in the link below.