PC CD-ROM can not be prompted to insert into the system

I would like to ask, recently my computer every day of the first boot stop all the “Founder” than the normal time frame for a long time, and then called me and then insert the system, it stopped, I would like to re-set BISO can, which is Why? I start to be re-activated hard drive also prompted to insert the CD-ROM, it is necessary to restore settings BISO it!
BOOT FROM CD:
DISK BOOT FAILURE, INSERT SYSTEM DISK AND PRESS ENTER

that you reinstall your Systems do have important things not to do a good job, so you must find your system disk to copy you.