Group: Forum Members
Rufus is a great tool, but converting your flash drive to GPT isn’t necessary for UEFI booting. All that will do is PREVENT Legacy BIOS booting, whereas keeping the flash drive as MBR allows both Legacy and UEFI boot modes. If you have a UEFI system, then it's not a problem to use Rufus that way, but it doesn't deliver any benefit over using Rescue Media Builder either.
For the hash MD5 comparison, if the issue you're describing occurs every time you try to generate an ISO, where are you getting the “correctly generated” ISO you mentioned above? If that ISO was generated by an older Reflect version or even the same Reflect version on a different PC, then a hash difference would be EXPECTED. Different Reflect versions of course have different versions of various files, and even the same Reflect version with the same Rescue Media build settings can result in different ISOs on different PCs, because things like the included drivers, the RMBuilder.xml file, and the small Reflect.cfg file inside the Boot.wim file can be different, and any of those things will cause the hash to be different. That is normal.
And since you mentioned an error originally, what is the actual error you’re getting? When this behavior occurred before the latest update, the problem included an actual error message. If you’re not seeing an actual error message at all and are just assuming that there’s a problem because the ISO is smaller than you expect, a size difference does not necessarily indicate a problem. A change in WinPE version might cause that, or if you're using WinRE, a change to the contents of your Windows Recovery partition could also cause that, and that can happen for a variety of reasons.
Does your Rescue Media work when you test boot it?