File Extension Search

.msp File Extension

Developer: Microsoft Corporation
File type: Patch File
You're here because you have a file that has a file extension ending in .msp. Files with the file extension .msp can only be launched by certain applications. It's possible that .msp files are data files rather than documents or media, which means they're not meant to be viewed at all.

what is a .msp file?

The MSP is a file extension associated with Windows Installer Patch file used for updating Windows and Microsoft programs. The MSP file format and Windows Installer Patch were developed by Microsoft. It allows bug fixes, security updates and hotfixes. It can be opened with Windows Installer programs such as Hotfix.exe and Update.exe. MSP files are self-contained packages that contain the application changes and information regarding which versions of Windows is eligible for the patch. A patch can be installed individually specifically when an MSI already exists in the system. This means that a patch may contain an entire file or bit files needed to update the part file. An MSP file contains a minimum of two database transforms. The first database transforms updates of information while the second database adds the information. A patch package consists of Summary Information Stream, Transform Substorage, and a Cabinet File Stream. Files in MSP format can be opened with Microsoft Windows Installer in Microsoft Windows platforms.

how to open a .msp file?

Launch a .msp file, or any other file on your PC, by double-clicking it. If your file associations are set up correctly, the application that's meant to open your .msp file will open it. It's possible you may need to download or purchase the correct application. It's also possible that you have the correct application on your PC, but .msp files aren't yet associated with it. In this case, when you try to open a .msp file, you can tell Windows which application is the correct one for that file. From then on, opening a  .msp file will open the correct application. Click here to fix .msp file association errors

applications that open a .msp file

Microsoft Windows Installer

Microsoft Windows Installer

A Windows Installer patch (.msp file) is a self-contained package that has the updates to the application and describes which versions of the application can receive the patch. An application that has been established using the Microsoft Windows Installer can be advanced by reinstalling an updated installation package (.msi file), or by applying a Windows Installer patch (an .msp file) to the application. Patches handles at a minimum of two database transforms and can contain patch files that are saved in the cabinet file stream of the patch package. Servicing applications by distributing a Windows Installer patch, relatively than a complete installation package for the updated product can have advantages. A patch can handle an entire file or only the file bits necessary to update part of the file. This can enable the user to download an upgrade patch that is much smaller than the installation package for the entire product. An update using a patch can protect a user customization of the application thru the upgrade.

a word of warning

Be careful not to rename the extension on .msp files, or any other files. This will not change the file type. Only special conversion software can change a file from one file type to another.

what is a file extension?

A file extension is the set of three or four characters at the end of a filename; in this case, .msp. File extensions tell you what type of file it is, and tell Windows what programs can open it. Windows often associates a default program to each file extension, so that when you double-click the file, the program launches automatically. When that program is no longer on your PC, you can sometimes get an error when you try to open the associated file.
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