The msvcrt40.dll file contains several support functions for applications built with Microsoft Visual C++ - the msvcrt40.dll naming actually means Microsoft C++ Runtime Library, version 4.0. Lots of applications have been built using this development environment, that make use of the msvcrt40.dll file. This means that msvcrt40.dll file is a rather common runtime library that should be availble on most Windows machines.

Actually, msvcrt40.dll dll is provided with several versions of Microsoft Windows operating systems, but we must observe that it is not actually part of the operating system itself, and therefore it does not benefit from the auto file protection provided by recent versions of this operating system.

There can be many causes that generate problems with the msvcrt40.dll file, for example deleted by mistake by the user, hard drive problems, computer power failure or other hardware failure, virus attacks etc. This is a useful file, so you should not delete it from your system, as it provides support to various applications. Please note that there are cases when a badly designed installer prog may actually delete the msvcrt40.dll file when uninstalling some application, although the msvcrt40.dll file may still be required by other applications on your system.

If you are having problems with the msvcrt40.dll file, there is a simple solution that will work in most cases - you can recopy the msvcrt40.dll file onto your hard disk. The msvcrt40.dll file should be placed in your Windows System folder (for more information please see below). A copy of the msvcrt40.dll file can be downloaded right here. Please note that in order to download and/or use anything from our website you need to accept our terms. Download and use is at your own risk.

Important note: the Windows System folder can be different depending on operating system and the install path that was originally used when your Windows Operating system has been installed. The defaults for this folder are:
- C:\Windows\System32\ on Windows XP
- C:\WINNT\System32\ on Windows NT and Windows 2000
- C:\Windows\System\ on Windows 9x and Windows ME