I want to create a Multi Boot USB disk containing a win 10, win10PE (kyhi's rescue disk), sergei sterlec along with two Linux distros and an anti virus rescue disk. For now I'm just testing with win 10, kyhi's rd and Sergei. My biggest problem comes with sergei's disk. Rufus can't do the multi boot for me. Tried yumi but it just messed up the USB and did nothing. Tried winsetupfromusb which booted win 10 and winPE but didn't show me the option to boot to sergei's. I think that is because I had to load sergei's as grub4dos through WSFU. But I can't understand why it is so, since I can load sergei's disk normally if I made a bootable USB through rufus in uefi mode. I read that grub4dos doesn't support uefi but I could load it if I made it through Rufus. I tried using easy2boot which booted the win 10 normally but then I added the winpe and sergei's disks too after which it didn't detect my USB in uefi mode. In legacy it works fine but I need it for uefi mode. Can someone shed some light in how I can accomplish this task?