The optical drive is broken and there is no USB boot. Can you still install the system?

Can we think of the possibility of using an external optical drive to install the system? I've thought about it for a long time, and I'm sure it will, but where do we get an external optical drive? It's impossible for us to install a system for the computer to buy an external optical drive, and the computer repair shop has I wouldn't have to write this experience if I had to repair the computer at the repair shop. Is it the purpose of our own system to save dozens of dollars?

In order to install a system like this, it took me 3 days to explore this method, I have tried the following methods, the results failed: A. I made the U disk as a mobile hard disk icon (which is inserted on the computer is not shown on the removable hard disk, but the display is a local disk), the start of the selection of hard disk boot , but not feasible. B. I think again, since the system is stored in the hard disk why I can not install the system of the computer's hard drive down to be able to use the CD-ROM or a USB boot to the computer installed on the system and then put the original computer inside, the result is a blind happy one, failed to start up, and ended in failure!

Then I would like to introduce my successful experience:

I thought again, can you still use the method of removing the hard disk to wait until the system is copied when the system will restart, this will be restarted when we immediately forced the shutdown, and then the hard drive down to put back to the original computer and then start, then we will see the computer began to configure, then we have succeeded!