Windows 8.1 X200s

[grunger106]

I've just put Windows 8.1 Pro RTM on my X200s (From my TechNet Sub) previously running Win8 Pro
Anyone else tried this?
Most things work (No Hotkey yet, System Update is a no go and no WWAN) but nothing I can't live with there
However - I can't get the machine to sleep / or even shutdown with fast start enabled...
It nearly gets there, I see windows do the pre-prep for sleep, the screen goes off, but the unit doesn't sleep/power off

[techweenie]

I recently loaded 8.1 Pro RTM on my X301. I was able to get System Update installed by doing a silent install.

Open a command prompt (DOS) session.
Using DOS commands go to the folder where you saved the file you downloaded from the System Update download page.
Launch the silent installation by adding the following parameters
to the downloaded filename -s -a /s /v"/qn". For example,
systemupdate502-06-26-2013.exe -s -a /s /v"/qn"
Then, press Enter.
Wait for the installation to finish.
Close the command prompt session.

The only relevant update it found was the hotkey integration driver, which seems to have fixed random freezes with the mouse. I haven't had any problems with sleep or shutting down though.