pc boots but there are some problems

okay so i put together a new pc today and as soon as i went to boot it. it boots up just fine, goes to windows and it says my pin is no longer available. I looked it up and found i just needed to hold shift and restart. except for whatever reason that doesn’t work. so then i tried turning it off and 3 times during startup. that doesn’t seem to work either. my leds on my motherboard to let me know if my cpu gpu ram and all that aren’t lighting up. which is good because then i know its not a hardware thing. i’m kind of just stuck at this point and would love some input.