Intel Virtualization Error

I'm trying to turn on Intel virtualization in my system Bios as some of my programs require it to work best,but turning it on causes my system on reboot to bring up a message telling me to "insert a proper boot method" and it won't proceed past that point. Any idea what's going on here,as this has me stumped? I was trying to do a install of Proton VPN at the same time,but I don't see how this could've affected anything,as it worked fine once I turned Intel virtualization off.