my iMac is locked up with a message from Windows defenders security center saying access to this computer is blocked for security reasons. This happened when I tried to access a Facebook.
I tried to access a site on Facebook. The windows collapsed into a big security message windows, defenders security, warning, windows, security center call Microsoft toll-free. I don’t have Microsoft I did have a Microsoft security which I canceled but I don’t have it now and I tried to restart my computer, and the same message came up with my computer locked..
iMac 21.5″, OS X 10.11
