Hi, homies. i have a small company and i sell computers and their accessories thought im not IT technichian but sometimes i repair my Computers, so there is a problem that i met mostly when i want to install windows OS to a new Computer (The one that i want to repair it now is toshiba Satellite c50-A635) it says that there is no bootable device -- Please restart system, and if i insert the disk and hit F12 then choose the CD/DVD (where my installation is) it says "checking media" and after while it repeats again "No bootable device" i googled it and finally i realized that there is no Boot mode in the system configuration. so If there is someone who can help please im appriciated, thnak you very much!