Question: how to install from a cab file?
Answer: Download the CAB Files x86 / X64 depending upon the OS architecture.
Rename file to KBnumber.сab (for example KB3176931.Cab)
Copy to folder C:\
Run command-prompt as admin (Right click on Windows icon and choose option). ... 
Enter the command “DISM.exe /Online /Add-Package /PackagePath:c:\KBnumber.cab“