I formated my hard drive and then i installed windows 8 now its writing no bootable device

[nkosinamandla17]

Am 18 years old

 

[Colif]

check the boot method of the laptop, if its currently set to Legacy, set it to UEFI and try booting again. Visa versa if its set to UEFI.

What laptop is it?

YOur age really doesn't tell us a lot