I have had this problem too for a couple months on one of my computers. I upgraded the other to Windows 10, and now that has problems.
I do not run any antivirus at the moment. Please help.
Works fine on 1.8.9, but it seems like the 1.9 update broke it. I have already done a reinstall of Minecraft and Java. Will be updating my drivers.
Did a crap ton of restarts and reinstalled my VPN. That worked.