Windows PCs around the world were locked into a reboot loop last week after anti-virus giant McAfee sent out a flawed routine update. The update, issued last Wednesday, was meant kill a minor virus but instead mistakenly classified a key Microsoft Windows operating system file as the malicious program and deleted it.
This caused the updated computers to shut down and go into an endless cycle of reboots. Some of the affected customers included hospitals and police departments. McAfee said the problem affected a small percentage of its enterprise customers around the world.
Anti-virus vendors have sped up the delivery of virus signatures, or updates, in an attempt to catch up with the creation of malware by hackers. While this ensures computers are safe from threats once they are released, it also means that a large number of machines can be affected when accidents happen.