I had a problem with ubuntu a few days ago so I decided to uninstall it. Ubuntu was installed "inside windows" so I just uninstalled it as you uninstall any normal program. This normally works for me, but for some reason now when I start my computer it still asks me to choose ubuntu or windows, when I don't have ubuntu installed anywhere (and if I choose ubuntu I get an error saying there's nothing to boot). I've been trying to figure out how to delete this unexisting OS which I don't know why my computer thinks it's still there. If I try to re-install ubuntu I will get 2 Ubuntu options on the multiboot option. Is there any easy way to fix this without having to delete everything from my HDD? Thanks in advance!
Edit: I think I should emphasize that there was no "extra partition", both OS were on the same partition (I used the "install inside windows" option from Ubuntu)