Good advice.Hapo, with all due respect, it sounds like you have just enough computer knowledge to be dangerous. Take that laptop to someone that knows what they are doing.
Hapo unfortunately messing with partitions involves command line work: "Diskpart" command. Not a rocket science, but once done it, you will be stuck working through BIOS and command line. Things will get even more confusing. We can try it here, but it will be against my better judgement, we will encounter issues. Let me know.
I will be happy to try and resolve it, but you will have to send me your laptop.
Don't send your stuff back yet! rumble phish will get your PC going in no time building one is not a big deal. Viruses can get more complicated.
Before we give up ... Try this. It will reset your windows to a generic MS image. After this you can try dell process again.