Booting Win 8.1 from an external hard drive?

Question

USB

Hello!
There was such a problem. On a freshly purchased laptop (Acer V3-371-584N), there was originally a terabyte hard drive with Win 8.1 preinstalled. On the first day of purchase, it was successfully replaced with an SSD where Linux was installed.
HDD now began to live in a USB 3.0 container. There was an idea, if necessary, to load Windows from an external hard drive, but all attempts failed. In the BIOS, you can set the boot order of disks and configure the system to boot in UEFI mode. So, as a result, a blue window appears with the text that some kind of dump is going to solve the problem and the laptop will be rebooted. Didn't move further.
What else can you try to do?

Answer 1

If the question of legality does not excite, then Windows 2 Go.

Answer 2

Here's what is recommended for installing Win7 OS on external media - the PWBoot program. There is a hope that it will also work for Win8.1. But this hope is not 100%, because even for Win7 this program has limitations:
1. PWBoot stubbornly does not want to work with Cyrillic.
2. PWBoot offers two installation options to choose from - directly to an external drive (with its mandatory formatting) or to a virtual disk in VHD format. The second option necessarily requires Windows 7 Ultimate or Enterprise.
3. FS - only NTFS.
4. It is also highly desirable to disable or transfer the paging file and all temporary sites to another medium, disable the indexing service and, in general, all unused / unnecessary services.