Win PE hangs at startup of easyDriveLetter

Hi,

I downloaded WinBuilder 2015 yesterday and created a boot disk as described in the tutorials. This all worked out very well - thank for the great tool! I added 7ZipPortable and CPUZ as plugins.

Now after burning the ISO on a CD-ROM and booting from there, Win PE starts to boot as expected, but then hangs with the following screen:

There is nothing I can do in this situation, there is no mouse pointer on the screen and pressing any keys on the keyboard (i tried at least ESC, Space, Enter, Backspace, Alt + F4) don't do the trick. Any idea what to do?

There are two harddisks in my computer, but they may both be broken (which is why I try to run Win PE). Could there be an issue with easyDriveLetter if not any drive was found?

Thanks and cheers,

dmr