Programs and applications often require other files to be present on your computer, but sometimes this isn’t the case. DLL stands for Dynamic Link Library and these files are used by many programs including games.

MSVCR100.DLL is a Microsoft Visual C++ file and is required by applications which were made with Visual C++. However, while downloading this file and copying it to the Windows\System folder should fix the error for most people, it might need to be copied to the game or program’s folder, so you’ll need to know which application threw up the error.
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