File Extension

MSP File Format

Windows Installer patch file

MSP file format icon

MSP is a file extension for a Windows Installer patch file format used by Windows and Microsoft programs, typically for bug fixes, security updates and hotfixes.

Most Windows patches are sent as MSP files. MSP files open in Windows Installer.

The MSP file extension is also used for Microsoft Paint bitmap files. 

 

Learn more about MSP files:

Brien Posey on executing an .MSP customization file in Microsoft Outlook 2007 at Search Exchange

Search for answers to Windows update questions at IT Knowledge Exchange.

This was last updated in July 2010
Editorial Director Margaret Rouse
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