I have a couple of computers and Virtual Machines running Windows 10 Technical Preview. A few days ago Build 9860 was released but I didn’t want to have to download this update on each computer or vm. I found a work on around.
Download and Backup the update
On one of your computers, you will need to download the update by going to Start -> Search -> Windows Update Settings and then choosing Preview builds and click “Check Now”. Download the 2.7 gb update to your computer but DON’T click install. Instead open your windows explorer and go to C:\Windows\SoftwareDistribution\Download folder.
In that folder you will find another folder named 90e20608895b69e99c2e15487a65d780. It should have three files in it
9860.0.141008-2044.fbl_release_CLIENTPRO_RET_x64fre_en-us.esd
state
WindowsStoreSetupBox.exe
Copy the entire folder to another location such as an external hardrive or usb thumbdrive. This step is very important as the update deletes itself after the install.
Now go ahead and update your system.
How to use this back up?
On your second computer or virtual machine instance, open the windows explorer and copy the 90e20608895b69e99c2e15487a65d780 folder you backed up to C:\Windows\SoftwareDistribution\Download
Now when you go to the Preview builds update and click check, your computer will have the Install Update option instead of download. Go ahead and install the update. (Note: you may have to reboot if the computer didn’t find the update.)