It's true that Windows installation sometimes takes a while to start up (sometimes 2 or 3 minutes), depending on the media used.
I don't know of any way to convert from ExFat to NTFS without data loss. You have to reformat the flash drive.
I'm using Ventoy without Secureboot, which only causes problems.
My USB key is configured in MBR, NTFS and without Secureboot.
All my images are in the \Iso directory and the ventoy config files (json, Themes and others..) are in \ventoy (be careful not to capitalize this directory). With such a setup, I've never had any problems installing any version of Windows (or Linux for that matter, whether in Live mode with or without persistence, or not) whatsoever.
I don't know of any way to convert from ExFat to NTFS without data loss. You have to reformat the flash drive.
I'm using Ventoy without Secureboot, which only causes problems.
My USB key is configured in MBR, NTFS and without Secureboot.
All my images are in the \Iso directory and the ventoy config files (json, Themes and others..) are in \ventoy (be careful not to capitalize this directory). With such a setup, I've never had any problems installing any version of Windows (or Linux for that matter, whether in Live mode with or without persistence, or not) whatsoever.