Hey everyone, Sorry if this isn't in the right area as I didn't know where to post this. I have Windows 7 Pro x64 installed on a new laptop and have Windows ADK (just DISM and Windows SIM v6.3.9600.17029). In Windows SIM, whenever I try to Select a Windows Image it comes up with an error: "Error opening Windows image at xxxxxxx" "An item with the same key has already been added" I have a VM of Windows 8.1 with Update 1 and it too has the same error. Attached is the error I receive. I've tried reinstalling the ADK, repairing the install and updating however I can't seem to solve the problem. http://forums.mydigitallife.net/attachment.php?attachmentid=31941&stc=1 UPDATE: I have done a fresh install of Windows 7 and Windows 8 in VMware Workstation; downloaded the latest Windows ADK, installed it and I receive the same message??? WTH is up with this? UPDATE 2: Is this just for me? pebkac? I just tried SIM on my old desktop and it, too, doesnt work UPDATE 3: Here is the error log: Code: 11:41 PM : This application requires version 6.3.9600.16384 of the Windows ADK. Install this version to correct the problem 11:41 PM : 11:41 PM : Error opening Windows image at D:\Win7\install.wim. 11:41 PM : 11:41 PM : System.ArgumentException: An item with the same key has already been added. at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add) at System.Collections.ObjectModel.KeyedCollection`2.InsertItem(Int32 index, TItem item) at Microsoft.ComponentStudio.ComponentPlatformInterface.WimInfo..ctor(String wimPath) at Microsoft.ComponentStudio.ComponentPlatformInterface.Cpi.OpenWim(String wimPath) at Microsoft.ComponentStudio.ImagePicker.GetImageInfoFromPath(String path) at Microsoft.ComponentStudio.ImagePicker.ValidateImageFileOrFolder(String fileOrFolder) UPDATE 4: So I found out that an original ISO of Windows 7/8/8.1 works fine, it's only the wims that I have integrated updates (security, hotfixes, IE11 etc.). Still kind of a pain.