I just installed Kubuntu 14.04, and I cannot boot into the previously installed Windows 8.1. As I read everywhere, this shouldn't be a problem: Kubuntu should recognize that Windows is there. But every time I start Kubuntu boots without asking anything. Thank you for your answers! UPDATE: I realized that I run a chkdsk on the Windows' partition, and I didn't let it end, so it may be marked as "unclean" as written here: Problem to enter in NTFS partition Still struggling to make it work, though.