I followed this guide here to set the default operating system at boot-up to Ubuntu. Since I installed Ubuntu using Wubi, it involved setting the default operating system of the Windows boot-looader using some preference settings on Windows.
Now I have locked myself out of booting into Windows at all. I cannot use F12, F8 or anything to get Windows to boot.
Does anyone have a guide to boot into Windows so I can change the option back to choose what operating system I want to boot?