Having to prss power button twice on laptop before it will start

I have this new GE62 MSI laptop running Win10 all was fine with it until by coincidence apparently windows updates some drivers and then right after my optical drive died, along with the MSI recovery methods got corrupted... the service centre replaced the optical drive etc and I got the laptop back I tried the drive and started to configure Windows to my liking a few items at a time, again everything fine....

Now all of a sudden the problem is I push the power button once it stays on the MSI boot logo until I push the button again and it turns off straight away, push the button again the MSI logo appears and then I get the little Windows loading circle of dots and Windows loads up and works fine after that....

Obviously this is not right and peeing me off especially since it has only just started happening, I don't have much in the way of software installed and its the same software I had installed before the optical drive died and I did not have that problem before then....

Any suggestions please guys.

Hello Andy,

Here is a suggestion: try turning off Fast Start-up and see if it makes a difference. Turn On or Off Fast Startup in Windows 10

Thanks, I tried that but it made no difference... I changed the boot order to usb/dvd then hdd and that has solved the problem for some reason.
The thing being there are a few similar boot order entries that basically mean the same thing just worded differently so technically I have not changed anything apart from one worded entry to it's counterpart, MSI logic is quite strange.