08-02-2016 10:50 AM
I just recently performed the 26-Jul BIOS update to 1.14, for my Thinkpad Carbon X1 (20BS) with windows 10.
The update went ok, but afterwards, Windows is crashing when booting.
Using a bootable Windows 10 installation disk also crashes when booting. The recovery environment also crashes when booting.
Using detailed logs, it seems to crash when activating the ACPI microcontroller.
I would assume that has something to do with the UEFI update, that I have disabled in the BIOS. Enabling it does not recognise the disk, as it is not a GPT partition.
I tried to rollback the BIOS, but it does not allow it.
Do you have any suggestion on how to proceeed?
08-02-2016 02:48 PM
Do it well, worse becomes itself
08-02-2016 03:31 PM
Thanks, already tried and does not work.
since my boot disk is MBR format (not GPT) the disk is not recognized by the UEFI bios.
so I am locked out: UEFI bios boots but does not recognize disk.
non-UEFI bios recognizes disk but crashes at boot start.
08-03-2016 06:48 AM
The BIOS settings can be changed by performing these steps:
08-22-2016 11:04 AM
I am having the same problem. After the bios update which I did today I am locked out of windows, and even using a USB recovery drive does not work (the spinning dots freeze after a second or two). This is really infuriating
08-22-2016 11:23 AM
The answer to many 'fails to boot' situations with the latest round of BIOS updates is to turn off Execution Prevention in the BIOS settings. This particularly seems to be an issue with Windows 7 machines.
Turning off Execution Prevention is not ideal, as it disables a security related function. Hopefully Lenovo will issue new BIOS updates for the affected machines so that Execution Prevention can be turned back on.
If turning off Execution Prevention doesn't solve your issue, I would reset the BIOS to factory defaults and try again. This will re-enable Execution Prevention, so if it still doesn't work, disable Execution Prevention for a second time and see if you can boot the machine.
08-22-2016 12:29 PM