I have BitDefender on 4 PCs. My main PC seems OK, I get messages all the time that access has been denied, etc. My wife's PC also has BitDefender, but don't see any messages. She also gets messages that her PC has a virus and must push a button to fix it. The button is not pushed and the only way to continue is to push CTL Alt Del. Then restart and all is OK. What is going on?