Enabling Data Dedup in Windows 8

I run a lot of Hyper-V VMs on my Windows 8 laptop, and my second hard drive is getting full, with all of my inactive vhd files.  I was thinking “It’s too bad Windows 8 doesn’t have volume deduplication like Windows Server 2012.” But I decided to have a bit of a nosy around the internet to see if there was a 3rd party solution.

Lo and behold! (And really, it shouldn’t surprise me by now, but it did a little bit anyway.) I found a really useful site that taught me how to hack the 2012 Dedup into my Win8 laptop.

NOTE: Doing this will put your computer in an unsupported state (due to mixing and matching SKUs of the windows code). It is up to you to assess the risk/reward equation of these actions.

Here’s the link:


One of the dism commands is a little hard to copy/paste from his website, so here it is:

dism /online /add-package /packagepath:Microsoft-Windows-VdsInterop-Package~31bf3856ad364e35~amd64~~6.2.9200.16384.cab /packagepath:Microsoft-Windows-VdsInterop-Package~31bf3856ad364e35~amd64~en-US~6.2.9200.16384.cab /packagepath:Microsoft-Windows-FileServer-Package~31bf3856ad364e35~amd64~~6.2.9200.16384.cab /packagepath:Microsoft-Windows-FileServer-Package~31bf3856ad364e35~amd64~en-US~6.2.9200.16384.cab /packagepath:Microsoft-Windows-Dedup-Package~31bf3856ad364e35~amd64~~6.2.9200.16384.cab /packagepath:Microsoft-Windows-Dedup-Package~31bf3856ad364e35~amd64~en-US~6.2.9200.16384.cab

And since there is no gui for dedup in Windows 8, here’s a link to the online PowerShell help for the dedup cmdlets: