I have a system with dual boot (debian 8/ windows 8)
After i formatted a drive from windows 8 i'm unable to boot even from usb, always it says 'Unknown Filesystem'.
Now, I can only boot the linux by using grub commands like
I've tried to format the drives after booting the debian 8, this way. But, still i can't get into the system without grub commands.
Now how can i boot from usb & install a new OS removing all the partitions ?