Now after running into two different grub errors, my PC refuses to boot from anything. First I got the grub error no such partition, so I booted from Ubuntu 17.10 install disk and reinstalled Ubuntu...

When I install Windows 7, then 10, everything works fine and Windows 10 Bootloader shows both 10 & 7 (and they both work). However, installing Ubuntu messes everything up. Is there a way to remove...

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I'm trying to setup a tri-boot on a Dell Optiplex 745 (Windows 10, 7, & Ubuntu)and I can't get Windows 10 Boot Manager as the default boot menu (the blue screen boot options menu [1]:...