The problem I'm noticing is this patch does not agree with our avast users. While after a match i noticed my computer was acting a bit funky so I decided to run a virus scan on my computer via Avast.
After this scan it showed one infected file (wish i screen shot it) It was inside the League of legends file and was classed as a highly dangerous so naturally i was like oh **** remove... that instant the game started showing me these errors.

So i did another reinstall from vanilla still with my virus software on and boom same error code four hours later. Now I'm unsure if this file that my avast is blocking is a true viral code or just one perceived as but I highly suggest riot look into all the code that was released in that mini patch to figure out why one file is firing off that its a virus to our software.

System restoring my computer as a absolutely last resort.... as my whole computers throwing a fit now.

I also had this happen with my Avast. It is identifying a specific file in LoL as a virus. I, like most of you, had the "F#$K!" response and deleted the file. Now league will not run properly. I get the "Fatal Error-0002" ErrorID:2032.

All ya gotta do is completely uninstall and reinstall with AVAST SHIELDS OFF. All shields just to be safe. I assume doing something along those lines for other antivirus software should do the trick. After download is complete, turn the shields back on. Avast will continue to think the file is a virus which Riot will have to fix i guess. So dont expect anything soon.

I've tried everything on this thread.

Disabled shields on Avast, uninstalled Avast, checked Firewall, reinstalled LoL, redownloaded LoL.

Nothing works.