Microsoft briefly disables anti-virus software for Windows 10

For the applications that were not compatible, Microsoft built a feature that lets users update their PCs and then reinstall a new version of the anti-virus software.

"To do this, we first temporarily disabled some parts of the AV software when the update began. We did this work in partnership with the AV partner to specify which versions of their software are compatible and where to direct customers after updating," Mr Lefferts writes.