This article was previously published under Q187910
Retired KB Content Disclaimer
This article was written about products for which Microsoft no longer offers support. Therefore, this article is offered "as is" and will no longer be updated.
When you attempt to start Internet Explorer, you may receive the followingerror message:
A required .dll file is missing Msvcirt.dll
This behavior can occur if an incompatible version of the Msvcrt40.dllfile exists on your computer.
To resolve this issue, rename the Msvcrt40.dll file located in theWindows\System folder, and then extract a new copy of the Msvcrt40.dllfile from the Ie4mfc40.cab file located on your computer or your InternetExplorer CD-ROM to the Windows\System folder.
For information on how to locate a file on your computer, click Start,click Help, click the Index tab, type finding,and then double-click the "Files or folders" topic.
For information about how to rename a file, click Start, click Help, clickthe Index tab, type renaming, and then double-click the "Renaming files" topic.
For information about using the EXTRACT command to extract a file, see thefollowing article in the Microsoft Knowledge Base:
129605How to Extract Original Compressed Windows Files
NOTE: If you do not have the Ie4mfc40.cab file on your computer and you donot have an Internet Explorer CD-ROM, connect to following Microsoft Website to download the Internet Explorer Setup files: