There is some bad news for people who use the BitDefender anti-virus software who happen to also have 64-bit Windows. A recent update caused major disruptions for these users when BitDefender quarantined several Windows files as infected. Users have complained that they can no longer boot up their machines or use any files.
BitDefender has announced that they have a fix for the problem and are working to help customers fix the damage caused. They also advise that users can use Last Known Good Configuration or System Restore top return their computer to normalcy. They also advise customers to disable BitDefender until a final update that will fix the problem for good.