Which tablet is that, and what software is it running?
I think full Windows 8 tablets are the only ones that will run ADE itself; the other run software such as Bluefire or Aldiko apps.
I suspect that ADE on Windows 8 does not support touch.
I'm not sure if there are yet any Metro apps for DRM eBooks; I haven't found any.
I think the market is too small for the app producers to have bothered.