I have just send mine in for replacement, didn't want to wait.. and just as I had UPS pick it up, a techsupport just called me with a possible solution that you guys might find helpful.. since I wont be able to test it!
So here you go.. this should remove the Unregistered Device SE, according to the techsuppoerter:
| Step 2: |
In the search box, enter command prompt . |
| Step 3: |
Touch and hold (or right-click) Command Prompt to bring up the context menu. Tap or click<br>Run as administrator . |
| Step 4: |
On the User Account Control dialog box, tap or click <br>Yes . |
| Step 5: |
At the Administrator: Command Prompt , enter the following:<br> <br><br> powercfg -setdcvalueindex SCHEME_CURRENT 19cbb8fa-5279-450e-9fac-8a3d5fedd0c1 12bbebe6-58d6-4636-95bb-3217ef867c1a 3 |
| Step 6: |
Then enter <br><br> powercfg -setactive scheme_current |
Did this work as suggested? This fix was originally published to address a network adaptor issue for those who updated from 8.1 Preview to 8.1. Shouldn't be an issue for anyone who updated from a refreshed device. And haven't we all at this stage!
Surface RT only: Battery issue when updating from Windows RT 8.1 Preview
If you updated Surface RT from Windows RT 8.1 Preview to Windows RT 8.1, you may notice a decrease in battery life. During the update, the wireless adapter power policy isn’t migrated. Instead, the power policy is set to a default value that consumes more power both during use and in the connected standby state.
See also http://blogs.technet.com/b/richardsmith/archive/2007/11/29/powercfg-useful-if-you-know-the-guids.aspx if you're curious about those GUIDs.