Cacher is the code snippet organizer for pro developers

This should go without saying, but you're going to want a computer with a fast Internet connection, and hopefully an SSD with a decent amount of free space, I'd say at least 20GB.

For this, we're going to assume that drive is "C:"

Start with downloading WSUS offline. You can use this tool to download nearly all of the updates that are available post-SP1.

http://download.wsusoffline.net/wsusoffline106.zip

I extract this to something simple like C:\wsusoffline

1. Next, run UpdateGenerator.exe
2. Under the Windows 7 section, select x64 Global
3. Click Start A command prompt will appear as it runs some commands to download all the updates. The updates will be downloaded to C:\wsusoffline\client\w61-x64\glb

Next, copy the full contents of the DVD to a location like C:\Win7x64SP1

Open an elevated command prompt and run dism /get-imageinfo /imagefile:"C:\Win7x64SP1\sources\install.wim"

This will list the index numbers for the different images that are available on the media.

dism /get-imageinfo /imagefile:"C:\Win7x64SP1\sources\install.wim"

Deployment Image Servicing and Management tool
Version: 10.0.10586.0

Details for image : C:\Win7x64SP1\sources\install.wim

Index : 1
Name : Windows 7 HOMEBASIC
Description : Windows 7 HOMEBASIC
Size : 11,707,704,502 bytes

Index : 2
Name : Windows 7 HOMEPREMIUM
Description : Windows 7 HOMEPREMIUM
Size : 12,220,130,696 bytes

Index : 3
Name : Windows 7 PROFESSIONAL
Description : Windows 7 PROFESSIONAL
Size : 12,120,429,592 bytes

Index : 4
Name : Windows 7 ULTIMATE
Description : Windows 7 ULTIMATE
Size : 12,283,036,052 bytes

In my case, I'll use Index : 3

Next, we need to mount the image we're going to apply updates to. To do this, we need a tempdir to mount to. Make another directory on your SSD drive like C:\win7x64sp1wim

Mount the wim image to that temp directory dism /mount-wim /wimfile:"C:\Win7x64SP1\sources\install.wim" /index:3 /mountdir:C:\win7x64sp1wim

If you take a look in the C:\win7x64sp1wim directory, you will notice it now looks like the system drive of any installed Windows 7 machine.

You can now install the updates you downloaded with WSUS offline to this temp directory. dism /image:C:\win7x64sp1wim /add-package /packagepath:C:\wsusoffline\client\w61-x64\glb

Once all those are installed, you can now commit those changes to the image. dism /unmount-wim /mountdir:C:\win7x64sp1wim /commit

You can also follow information at https://technet.microsoft.com/en-us/library/hh825070.aspx for slipstreaming in drivers, which can be mostly helpful with chipset and network drivers.