So my friend laptop (Aspire V5-471G) HDD is broken but i have spare one. The problem is i cant go to the BIOS Setup for Boot priority i tried all F Key including esc ,del , and using FN, so i reset BIOS using remove CMOS method. but still i cant enter the BIOS utility. when i use win10 in CD,it can boot and setup for installing but without any HDD ,only DVD drive. if i connect the HDD the prompt said "Operating system not found " so in my mind i have a risky method , first Boot the setup using only the DVD Drive than connect the HDD while the Windows Installer ask where to put the OS, is it safe tho?(i copy the thread from my other account because i forgot the password)