Security update hits Window PCs

Thousands of PCs around the world have been paralysed by a security update that wrongly labelled part of Windows as a virus.

The update was sent out by security firm McAfee and made affected PCs endlessly restart.

Corporate customers of McAfee seemed to be hardest hit but some individuals reported problems too.

McAfee apologised for the mistake and released a fix to ensure PCs started working again.

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