I have to two operating systems in my computer. Ubuntu in D drive and windows 7 in C drive. Now I replaced window 7 with window 8 but I can't load both the windows simultaneously.. how I can resolve this problem??
As I understand after the windows 8 installation, now you cant boot ubuntu because the grub menu disappeared. All you need to do is re-install the grub. you can do it by creating a bootable USB using wubi. There are lots of tutorials in the web, If you want more assistance please ask below.