--- DAY 1 ---
I have completey reinstalled windows 8.1 on my SP2.
Unfortunately I have had to perform the procedure 5 times.
In the end I have used the following steps:
- perform complete reinstallation with new partitions using a previously saved/generated USB recovery pendrive
- an unknown device is present in Device Manager
- download the complete January 2014 Surface Pro 2 firmware and driver pack from microsoft website
- install/update manually one by one the drivers (included video and the unknown device)
- only now start windows update manually (install, restart, install,.......)
- In the end I have not installed the optional update microsoft silverlight and the following security update for microsoft silverlight; because after the above-mentioned optional updates I have had during the first 4 reinstallations a strange problem: a)
no-stop/endless windows update and b) endless/hang windows shutdown.
Now the SP2 seems to work well apart from the high CPU issue with microSD card inserted.
--- DAY 2 ---
I have found a new problem: my SP2 now show "endless-hang windows shutdown" when I use micro SDcards; this new problem is in addition to the high CPU issue with microSD card inserted.
Today I have tested 4 new microSDHC cards of 4 different brands
(two of them 32GB class10 UHS-1) and
(then low speed: 8GB class2 and 8GB class4)
Moreover I have tested and formatted them using different methods, including the formatter software found at sdcard.org
Unfortunately without success with SP2 (no problems with SP1)
It's amazing how different these issues are. The fishy stench of began after the failed December 2013 firmware update where most folks in Australia experienced the issues, where most of those I know in the U.S.did not. And with the lack of explanations
from the corporation, I really think Microsoft has a problem with its smart update system propagating dissimilar-to-damaging files to different units in different regions. I'm in NSW Australia and my SP2 boots up high CPU with microSD card inserted, System
(ntoskrnl.exe) hogging CPU chewing battery like m&ms. Thus far I'm running the fixed January drivers & firmware and avoiding the Feb versions at all costs. Could all posters tell us their issues along with region when the updates were obtained, Microsoft maybe
able to narrow down on the problems. Thank you.
Francesco, regarding your hang-on-shutdowns, have you tried disabling hybrid shutdown? At Start screen, type "choose what the power button do".