[Downgrade W10 to W7] Windows 7 won't boot

Hello sevenforum users,

I have been trying to replace pre-installed Windows 10 to Windows 7 x64 in UEFI (Secure boot disabled) on my girlfriend lap Acer V15 V3-575G-50W2. Bios version is 1.10. I have various reasons to downgrade, please accept it
I almost have lost my sanity with such a task (why should be so difficult to install another OS?)

As I wrote earlier, I wan't to install W7 in UEFI - so far I have successfully booted W7 x64 USB device, formatted Primary Partition (no other partitions were modified or formatted), the installation was almost made, just one restart was needed at the end of installation as usually. After the restart, the "Starting Windows" screen appeared, but it frozed almost immediately.

I'm running out of ideas now - I'm completely clueless and have no idea, what to search for...

Thanks for any usefull advice ^^

Try to run Windows 7 in a virtual machine hosted by Windows 10.

Have it already pass trough the OOBE where you define user?
Try booting safe mode (F8), and if it boots, go to device manager and install all missing drives and then reboot.

Hi Megahertz07,
it didn't pass to OOBE, it freezes while the "Starting Windows 7" is displayed.

It also freezes in safe mode...I can see list of drivers loading and it always stops after "..disk.sys" driver was loaded.
I want to mention that the laptop has hybrid HDD (with 8GB SSD "cache").

I suggest upgrading to Windows 10. :)

I'm not telling that is your case, but I've recently discover that on some new hardware, Windows 7 isn't possible to install.
A similar post is Is Windows 7 x64 UEFI install even possible?

ThrashZone said:

Hi,
Yea not too many people here understand or want too install win-7 with uefi :)
UEFI (Unified Extensible Firmware Interface) - Install Windows 7 with

Did you clean the disk or during the install ?
It's best to clean it with another computer.

Hi,
I already read the link you have posted, but....I noticed this point:

UEFI (Unified Extensible Firmware Interface) - Install Windows 7 with said:

• A blank, partition-free, hard disk for installation.

So I have to remove all the recovery partitions from previous W10 installations? I still can access to recovery and other options thru boot menu item "Windows 10" with options like: Change UEFI settings, Run CMD, Boot from other device, etc.....and I formatted primary partition...

If needed, I will wipe whole disk, but I still want to access W10 (license), OEM software and recovery tools, so thats why I didn't clean whole disk, but only primary partition.

Did you created a DVD or USB flash factory recovery disk?
If you didn't do it BEFORE wiping the disk.
If your BIOS doesn't have a option to created a DVD or USB flash factory recovery disk, install Win 10 using the Win 10 key that came with the laptop, install the Acer recovery program and then created a DVD or USB flash factory recovery disk.
Once you have the recovery disk, it's safe to clean the disk partitions.