Popular formats

diagcab 

Opening diagcab files

Have a problem opening a .diagcab file? We collect information about file formats and can explain what diagcab files are. Additionally we recommend software suitable for opening or converting such files.

What is the .DIAGCAB file type?

The wordy .diagcab extension associates with the Microsoft Diagnostics Cabinet (DIAGCAB) file type. Intended as automated troubleshooting packages to diagnose and/or resolve known issues, DIAGCAB files are part of the Windows Troubleshooting Platform (WTP). DIAGCAB packages are usually offered by Microsoft and other vendors (mainly, OEM) and can often be found on the Microsoft's Fix it online service.

A .diagcab file is a Microsoft Cabinet (CAB) compressed archive that contains a diagnostics package control file (XML, .diagpkg), along with a set of other supporting files (.ps1, .dll, .cat).

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Software to open or convert DIAGCAB files

You can open diagcab files with the following programs: