4.21 patch will NOT update

About two days ago, went to log in to league now that finals are over and saw that a new update had been released since I last played. So, I went ahead and let LoL do it's regular thing in the background and I noticed that it had stopped at 33% and was just sitting there, went to save my logs and the entire app crashed completely. So I gave up. Yesterday I tried once more and it stayed at 33% so I tried repairing it and, oh, it crashed again, and I got fed up and just quit. So today, I've wasted a good five hours trying to get this thing to update. I reinstalled League completely and oh, it loaded to 87% before crashing and then got stuck at 33% for an hour... NO files were being scanned, it just sat there. So then I reinstalled again and connected and Ethernet cable and I'm hoping that MAYBE this will load so I'm not completely bored out of my mind over my winter break. It's currently at 46% and has been updating for about 45 minutes since connection the Ethernet cable. Hopefully this works and I won't have to get riot involved, BUT it's not my antivirus or anything else running on my laptop. I closed everything (until just now to write this) and am letting League do its thing.