After 3 weeks of trying, today I installed Ubuntu 13.10 in my system. My system was already running on Windows 8 Pro. I installed Ubuntu by manually selecting a drive. The installation was successfully completed and it asked me to reboot. I did it after removing the disk. When the GRUB menu appeared I selected Ubuntu. Then a pink screen appeared and nothing else happened. I waited for sometime and now too nothing happened. So I restarted again and selected Windows in the GRUB menu. Then an error came saying like "Cannot load from disk". How can I solve these issues ?