Steve Si

Do you get the same issue if not using any \ventoy\ventoy.json file? Do you see any more messages if you use Text mode for Ventoy menu?

2GB or more of RAM are required for the Fedora netinstall ISO. Since a memory problem is reported, it would be useful to know how much RAM is in your...

Also try the grub2 command lsmmap Both under VM and on real system and paste screenshot here as may be a memory map/grub2 issue with your hardware/UEFI BIOS.

https://ventoy.net/en/doc_secure.html

Can you give some more info? Uefi64 boot? What isos work and what don't? Do windows ISOs boot?

Did you try pressing ctrl+i before selecting the iso?

OK. Sorry, I didn't realise it only worked in Legacy mode. Maybe @Ventoy can help? It might be nice to know if agFM UEFI grub2 menu system shows same issue...

agFM?

And cloneZilla?

Thanks. Interesting. Presumably there is no later BIOS update for that system? It seems a strange issue.