I cant boot after installing El Capitan

[luffy3]

Good Night!
I recently install El capitán.

But i have a little problem... All the things i install it doesnt works after reboot!
I try to install clover (only i can boot if i plug in the usb in the start), ketx, all but in reboot all dissapear.

I dont have internet.
Always when i try to install some ketx pop up one error.

PD: Acer Aspire 5742G

 

[P1LGRIM]

Not a Desktop - Moved to Laptop Support.