Yesterday I started getting the above error message when logging into FB and it directs me to a page to do a security scan (https://www.facebook.com/checkpoint/) At this page I get a message saying "Scan and Uninstall" and "Initializing. Please wait." And wait I do... Refreshing the page doesn't seem to help. Tried it from IE versions 8 and 10 as well as Firefox 17.
I highly doubt it is a virus on my computer as I have tried from four different computers, all with anti-virus/anti-malware installed. I have tried the FB to request an unblock of my account but it just comes back and says my account isn't blocked.
Ideas or suggestions?