Published on Thursday 10th January 2019

Unable to access data in numerous Windows shares today after the (KB4480970) update.

https://support.microsoft.com/en-gb/help/4480970/windows-7-update-kb4480970

When trying to access shares the error "The handle is invalid" is displayed.

Microsoft has suggested various work-arounds but the only fix we have discovered is to completely remove the KB4480970 update.