

I set my USB to be viewed as a raw disk using: VirtualBox raw disk emulation (The most recommended method from what I can tell). The Win 7 AIO installer I plan to use is one of these. If all my Windows installers on this USB were in ISO that would be no problem, but two of them required dumping the ISO contents onto the USB root since they didn't support emulation.

It was made with RMPrepUSB and it works perfectly from a normal BIOS boot in physical machines. I think the issue might be in the way this thumb drive was prepped. I'm attempting to use USB to install Windows 7 onto a VM. Despite my best efforts all the workarounds I've found online have failed in some fashion or another. To start off, I know that VirtualBox doesn't have built in USB boot support, but there are a number of workarounds.
