BIOS doesn't work; I was pressing F12 a lot (including F8) and it didn't boot into the BIOS. It's booting too fast or something.
The suspected problem was a corrupted HDD, some files were recovered to my main PC I'm using now.
The laptop also doesn't boot into the recovery environment. Holding shift down does nothing.
Also the only other PC I have is my main PC Dell Optiplex 960.
The F8 menu in the options of Recovery are safe mode, enable debug, boot log, disable malware protection, etc.
The only way I can get into the BIOS is letting my battery drain until the "battery low" message pops up, and I press f2 to go to battery settings.
Also, I don't think I have a flash anywhere :(
Edit: I did find boot order though.
Fun Fact: I forgot to put the hard drive screw back in when looking at it.