I cannot boot UBUNTU 16.4 from my hard drive after installing with a USB stick

Question

I installed UBUNTU 16.4 using a UBS stick and now after I cannot boot from the hard drive but only can use "try UBUNTU..." and boot from the USB...Why

Answer 1

The possibilities are as follows:

1) You failed to remove the installation media when prompted to by the installer and your system is still set to boot from USB.

2) Your hard drive has failed and 1 is also true.

3) You neglected to verify the hash of your ISO and have managed to install a corrupted operating system.

These possibilities are in order of likelihood.