How to open .DIAGPKG file extension?

If you cannot open a new file that has been saved in the .DIAGPKG format you need to download the appropriate software. The manufacturer of .DIAGPKG files is Microsoft; .DIAGPKG files belong to the System Files category. After downloading the application from the list available on our website just run an unknown file, and as the default set the newly installed application supporting the .DIAGPKG files. Activities performed in the order described should solve the problems with all the files in the .DIAGPKG format.

• What is .DIAGPKG file?
• How to open .DIAGPKG file?
• What is .DIAGPKG file?