In your BIOS check the EFI Legacy option for the HDD too. How come your Win 10 is installed in legacy mode? Did you upgrade from an old Win 7? Did you have partitions after C: ? Generally nowadays they come with the recovery partition after C: in order to make it difficult to install another OS.
Regards, Rony.
On Dec 20, 2015 16:21, "Royce Pereira" roycejp@gmail.com wrote:
Hi,
I have a Windows 10 PC with was installed in 'legacy' mode (not EFI).
I shrunk my C: to create free space of 25Gb for Ubuntu.
I created a 64 bit Ubuntu bootable USB pendrive.
For booting from the pendrive, I select the boot mode at the BIOS splash screen I have tried both 'USB drive' and 'EFI-USB-drive'.
I tried to install Ubuntu 15.1 but the free space is always marked 'unusable'.
Before this I'd got a warning that the installation was started in EFI mode, but target installation is non-EFI, and if I force it I won't be
able
to switch OSs. But this warning is not appearing subsequently, only my freed partiton is showing 'unusable'.
Is there a way install Ubuntu into the created free space in such a situation?