Thank you for your help.
Tried every thing you suggested. It turned out to be UEFI.
I disabled UEFI , enabled Legacy/CSM Boot Support and it booted to windows.
Thanks again for your help.
PC goes straight into UEFI. I noticed that the HD is in SATA Information, but is missing from the boot list,thus Windows not loading.
Fitted a new power supply. The system is built on an ASUS TUF H310-plus gaming motherboard