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Toshiba P50-B-115 Downgrade Win 7 with UEFI
Good day,
First of all thank you for your really appreciated help.
I want to downgrade from Win 8.1 to Win 7 my notebook Toshiba P50-B-115, and I would like to maintain UEFI BIOS.
Here is what I did step by step, according to your superb guide:
1) From bios setup
Disable SECURE BOOT
Keep enabled UEFI MODE
2) Created a bootable GPT/UEFI USB with win7 64 bit using Rufus
3) Launched Win 7 setup at boot using USB
---> Custom Install 'advanced'
---> 4 partition on Drive 0
---> Deleted all 4 partitions and then clicked on New - Apply
4) Now I have 4 partitions again: Recovery, System, MSR, Primary
(On the guide i was following it's recommended to have only 3 partitions, System-MSR-Primary)
5) After choosing Drive 0 Partition 4 "Primary", I proceeded with the installation.
It worked fine until the end and then it rebooted the pc.
From there I'm stucked: if I keep my USB into the PC, the installation process starts again from the beginning.
If I unplug the USB, pc is unable to boot and i get a message saying to reinsert the win7 DVD to correct errors at start-up.
Windows is unable to load: I get a message similar to .... System/EFI/Documents... etc
I've followed the guides here at sevenforum on how to install Win7 UEFI, but I'm pretty sure I'm doing something wrong.
Again, thank you for your much needed help
Matteo