CAB files are so-called Windows Cabinet Archives, which quite similar to Zip or Winrar represents a format for the compressed archiving of data. The compression method can be zip (deflate), Quantum and LZX. Cab files can contain not only the actual data but also digital signatures.
Cab files are primarily used for installation files of programs, drivers, or Windows system files, and most often come with a Setup.Exe or install.Exe. It is also possible to integrate CAB files into other files, as is often the case with msi files. (msi files are also installation files)
Many packagers can open most CAB files, depending on which program the CAB files were created from.
Most often resolving problems with opening CAB files is very simple. Just install an appropriate program that supports such files. All of the listed programs support CAB files, but may vary in offered function and purpose. Some programs may be capable only of viewing contents of CAB files or offer file conversion options, but may not be capable of editing such files.
It is possible that although a compatible program has been installed on user’s system, it is not used by the system to open it. This may happen because no default application was associated with this type of files. To associate CAB files with given application, select "Open with" from drop-down menu (accessed by right-clicking on the file). Then select from the list the program or application you want to be used to open this type of file. If the WinZip applications is not on the list, select "Browse" option in order to manually locate the directory where WinZip has been installed.
Sometimes problems with opening CAB files may not lie with the application itself, but can arise due to other causes, such as: