MSU are the Microsoft Update files. You can easily install the MSU file silently without reboot with the following command line: wusa.exe Windows6.1-KB123456-x86.msu /quiet /norestart To Uninstall it Silently you need to follow this simple procedure: 1) Run this command: expand c:\temp\Windows6.0-KB123456-x86.msu –F:Windows6.0-KB123456-x86.xml c:\temp 2) This will create an XML file in temp folder