I own a laptop (Acer Aspire V3-571G) running Windows 8.1 using an UEFI to boot the system. I've read that changing this to BIOS would cause trouble with Windows, so it is not an option.
First I tried to create a Ubuntu 14.04 LiveUSB with persistence enabled. However I couldn't manage to boot it (it never showed up in the list of bootable devices). A live version of the same distribution however was bootable.
The problem with the LiveUSB version is, that I can't do any permanent changes to the installed packages, which I need to customize. There are a view guides out there telling how to create a custom Linux distribution using Linux tools. However I couldn't find anything on how to do it on a Windows machine.
So how do I setup a custom Ubuntu 14.04 Live-USB on Windows 8.1? Any advice is highly appreciated.