How to open DIAGCAB files
Did your computer fail to open a DIAGCAB file? We explain what DIAGCAB files are and recommend software that we know can open or convert your files.
What is a DIAGCAB file?
DIAGCAB files are Diagnostic Cabinet files, which you can read more about below.
The DIAGCAB file extension indicates to your device which app can open the file. However, different apps may use the same file extension for different types of data. So a DIAGCAB opener may not be able to open all kinds of DIAGCAB files. In this case, though, we only know of one specific use.
Microsoft developed the DIAGCAB file format as a data and archive file format for Windows Vista, 7, 8, and 10. These .diagcab files are generated by the makecab tool, a Windows application built into these Windows OS versions. The data stored in a DIAGCAB file can be viewed using the Microsoft Support Diagnostic Tool, which is another application that's also available in these Windows OS versions.
The Windows Troubleshooting service uses these .diagcab files, which were introduced in Windows Vista. This application assists users in detecting problems and repairing system issues. This can also be used to send error logs and reports to Microsoft servers for analysis.
DIAGCAB file openers, viewers, etc.
These apps are known to open certain types of DIAGCAB files. Remember, different programs may use DIAGCAB files for different purposes, so you may need to try out a few of them to be able to open your specific file.