Good evening, I am after some help on a clean install of Windows 7 SP1 x64 please! I have the folder: C:\Win7ISOUpdates which contains ALL the Windows updates (.msu) that I want to integrate into an offline image using DISM. I have numbers at the beginning of each of the updates so as they will be integrated in the numerical order specified. The offline image is stored in: C:\Win7ISO\OFFLine. First Attempt: I created a Notepad file in C:\Win7ISOUpdates called SlipStream.cmd. Within that file I used the command: For %%U in (*.msu) do Dism /Image:C:\Win7ISO\OFFLine /Add-Package /C:\Win7ISOUpdates:"%%U" I mounted the image: Dism /Mount-WIM /WimFile:C:\Win7ISO\sources\install.wim /Name:"Windows 7 HOMEPREMIUM" /MountDir:C:\Win7ISO\OFFLine I executed SlipStream.cmd in an elevated command prompt from within the C:\Win7ISOUpdates folder and got an error message saying: "The C option is not recognised in this context.". Second Attempt: Then I did a lot of research on the Internet about using a Batch file to accomplish this and this is what I came up with (I have never done this before so please don't laugh). I created a Batch file: SlipStream.bat Code: @Echo off ::Set Paths : :Path to the Mounted OFFLine Folder Set MOF=C:\Win7ISO\OFFLine : :Path to the folder with ALL Update Packages Set AUP=C:\Win7ISOUpdates : CLS dism /Image:%MOF% /Add-Package /PackagePath:%AUP% Echo ........................................ Echo Update integration complete! Pause Exit Can anyone please tell me if this is correct? Thanks in advance.