I have a dual-boot machine with Windows 8.1 and Ubuntu 14.04. Then, I installed some drivers on Windows from a CD (chipset, NVidia, LAN and audio).
However, when I now boot into Grub and choose Windows, instead of loading up Windows as before the updates, it just sends me to a blank purple screen (the purple that is the Ubuntu colour by default). I have also tried running Ubuntu's boot repair, to no effect.
Any help?