changing operat. systems

[Lenny White]

how change from win 8 to win 7,toshiba C855D-S5305n

 

[USAFRet]

Buy a copy of Windows 7. Install it.

 

[Lenny White]

Have a copy will not boot screen comes up can not boot form dvd tryed usb still doesn't work

 

[USAFRet]

Ah. So we're looking for the answer to a completely different question.

Why won't it boot from the DVD? What is the boot order in the BIOS? Is the DVD scratched or otherwise unusable?