This document discusses how to fix errors related to a missing MSVCR100.DLL file. It begins by explaining that some applications require this DLL file to run properly and what error messages may occur when it is missing. Potential causes of the error like registry issues, malware, or hardware failures are outlined. The document then provides steps to determine if you have a 32-bit or 64-bit version of Windows and to download and install the correct Microsoft Visual C++ 2010 redistributable package to replace the missing DLL file. Restarting after installation should resolve the error.