Computer Powers on But does Not Boot

Hello, I have had Asus Desktop, and Iv'e had it for about a year and 2 months and i noticed that my Desktop was slow so i decided to restart it. I went to bed the next day and i saw the screen say "Asus" and at the bottom it says "Press Del or F2 to enter UEFI BIOS settings" so i pressed them both and nothing work. i tried unplugging the computer and monitor into different places and pressed Del and F2 and nothing worked. i held the power button and turned the Desktop back on and the screen stills says "Press Del or F2 to enter UEFI BIOS settings" i also got another monitor and it still says "Press Del or F2 to enter UEFI BIOS settings" If you can help me that would be great.

My guess is that i ran out of memory (ram). I also remember a long time ago (I use this Desktop for gaming. (Minecraft) and while i was downloading stuff for the game i got a message that i was running low on ram. So i am pretty sure i either need to get a new ram stick or place the ram stick into a different place.

I am not a computer geek or nerd so i don't know much about computers.

My YouTube is BabyHatPvP