X230: win 7 x64 in uefi using lenovo recovery media

[maloosheck]

I want to be able to boot my X230 in UEFI only (CSM off). Lenovo media for X230 does not seem to be UEFI bootable, so I boot it with CSM on. The Recovery program asks about the GPT or MBR partitioning with the explanation that with GPT it will be bootable in UEFI only. But when I reboot after recovery and turn CSM off, the "Starting Windows" screen freezes endlessly. There is some hdd activity, but no Windows are loaded.

Any clue what went wrong? Thanks.