Have you stuck with slow installation of MS Patches/hotfix? Are you in a hurry to fix this installation? I have a work around solution to the problem.

Ignore the MSU file and use the CAB file included in the package and remember not the one names as WSUSSCAN.cab

Execute the below command to extract the file:

expand -f:* “C:\%InstallFile%.msu” %TEMP%

For example:
expand -f:* “C:\Temp\windows8.1-kb4537821-91605-2012-r2.msu” C:\TEMP

Then use the following command to install the software:

dism.exe /online /add-package /packagepath:”%InstallFile%.cab” /quiet /norestart /logpath:”%LogFile%”

For example:
dism.exe /online /add-package /packagepath:”C:\Temp\windows8.1-kb4537821-91605-2012-r2.cab” /quiet /norestart /logpath:”C:\Temp\Logs\Install_hotfix_windows8.1-kb4537821-91605-2012-r2.log”

This be quick enough to complete your installation.

Happy Reading,
WintelAdmin