Hello forum, I've upgraded from w7 to w10 this morning and there's something I'm not very sure about.

I've done a clean install from a usb drive and everything works fine, but a new option has appeared on my boot sequence called "windows boot manager" and it's the only one that allows the os to be launched.

If I select my main drive as first boot device I get a 0xc000000f boot selection failed error. I googled around a bit and tried the command prompt in the installation repair menu to find out that bootrec /scanos doesn't detect any windows installations (this w10 is the only operating system on my machine).

Not sure whether this is normal or not, sometimes boot feels a bit slower but that might just be updates, configuration and similar stuff since it's a fresh install. Should I be worried or let it go as long as it works?
Thanks a bunch