Why won`t my laptop boot up or let me type?

I have a Gateway laptop running Windows 8.1. The other day I was feeding my infant while reading stuff online, and she spit up quite a bit all over the keyboard. I wiped it up as best I could and removed some keys to wipe up under them. It dried and continued to work fine. The next morning most of the keys had... show more I have a Gateway laptop running Windows 8.1. The other day I was feeding my infant while reading stuff online, and she spit up quite a bit all over the keyboard. I wiped it up as best I could and removed some keys to wipe up under them. It dried and continued to work fine. The next morning most of the keys had stopped working so I used an external USB keyboard. By the evening the laptop refused to boot up, staying at a black screen. I managed to get to safe mode, but at the log in screen the password bar is completely full of characters and it won't let me erase them or type anything even with the USB keyboard. I have no windows boot disc or usb drive to boot from, and any repair option I try requires my windows log in, which I am unable to do. I have accepted that I will probably need a new laptop but I would like to recover certain data on this one. Any idea what the issue is or how to get in, barring removing the hard drive or taking it to a repair service?
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