Desk top monitor



When I sign on to my computer the screen turns white, I cannot get to my start menu unless I do ctrl,alt,delete then this AV8 virus protector is suggesting I purchase this anti-virus program, how do I get rid of it, it constantly pops up, seems like it's taken over my computer
It's malware. Boot into safe mode with networking, download and install malwarebytes, and then run a scan to take care of it. If that will not work, download the setup file for malwarebytes onto a flash drive via another PC and then install/scan.