I tried to install Ubuntu 12.04 on my laptop alongside Windows 7 as a dual boot PC. After selecting the option Install Ubuntu alongside Windows 7, a black screen comes up showing the message
terminating all installation processes. Then my PC reboots to Windows 7, and the installation terminates.
I have enough space on my hard disk (at least 30GB free on Disk C on which Windows 7 is installed). What should I do?