Causes and solutions for system failure after the USB flash drive is successfully installed on Ubuntu 12.04

The reason why the system cannot be started after the USB flash drive is successfully installed on Ubuntu 12.04 and the solution is cheap. The original ubuntu11.10 system was accidentally broken. The new Ubuntu12.04 has been out for a while, and the latest things need something new (clutter1.10.0, Glib2.32.3), while the old version of the system is installed with a lower version, simply reinstall a new version of ubuntu. Download good image file, with Universal-USB-Installer-1.9.0.2 to load the image to make boot U disk, boot from the U disk installed Ubuntu, after restart can not start, only a cursor in the top left corner flash ah, this is the case when I try it multiple times.
I plan to reinstall the system. After I start it with a USB flash drive, I went into the system again. Find the cause and solution on the Internet, as shown in the following figure: by default, the grub boot program will be written to the mbr sector of the USB flash drive.
Solution: Use a USB flash drive to boot the disk into the system, run the following command on the command line terminal to install grub to the hard disk (here/dev/*** is the location where your Ubuntu is installed ). Www.2cto.com sudo update-grub
After sudo grub-install/dev/sda is restarted, the system can be started. Author zyz316919766