MDT hangs at sysprep working on HP 820 G3

1. In MDT/SSCM edit the task sequence that includes your capture, click on the "OS Info" tab, and click the "Edit Unattend.xml" button.
2. The Windows System Image Manager window will analyze the image you've selected (it will take a while) then display the current answer file configuration.
3. On the left side of the window, in the "Windows Image" pane you should see the name of the image you are using. If not, click the grey box to browse to and select the image file for the task you are performing (if you don't have one yet, try a generic image).
4. The catalog for the Windows image should be available now. Expand the tree to (YourImageName)\Components\amd64_Microsoft-Windows-PnpSysprep_(YourWindowsVersion)_neutral
5. Right-click on amd64_Microsoft-Windows-PnpSysprep_(YourWindowsVersion)_neutral and select to "Add Setting to Pass 3 generalize"
6. In the "Answer File" pane, expand the tree to unattend\Components\3 generalize
7. Click on amd64_Microsoft-Windows-PnpSysprep_neutral, then in the Properties pane to the right, change the value "PersistAllDeviceInstalls" to "true"
8. Save the answer file. You will likely get a warning about several of MDT's default values not passing validation. Ignore it and save it anyways.
9. Run your capture task again and this time sysprep should complete and move on to the "Create WIM" capture task.