Windows installation disc won't boot

I have bought an ubuntu pre-installed laptop and want to remove ubuntu and replace with windows 8.1 x64 pro.. It has UEFI and in GPT.. disabled secure boot.. but there is no fast boot or legacy boot options..

Problem is i can't boot my windows 8.1 installation disc.. It says an error 0xc0000225.

Here is what i did so far: - Boot Ubuntu Live USB - Removed all partitions and convert GPT into MBR - Disabled Secure boot on UEFI - After that boot my windows 8 installation. still got error

What should i do? is there no way of installing windows 8 on my laptop? or is my laptop only for Ubuntu?

Are you confident about Windows 8 disk? Does it work with other PCs. If your DVD disk is copied, then probably there is something wrong with your disk. Probably your disk is missing a file.

You should also check whether your first boot option is set to DVD drive, not hard disk or USB.

you can also try to change your boot mode. Don't select only UEFI in the boot settings. I can't specify the options because all mainboards are not of same look.