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A Windows 10 security update to fix ‘PrintNightmare’ broke some printers

As if an actively exploited critical error in Windows Print Spooler that could allow someone to remotely take over your computer is not bad enough, some people who installed Microsoft’s security patch found that the connection to their printer stopped working . In a near-recurrence of an issue that occurred last spring with another Windows 10 security update, system administrators discovered that many PCs were suddenly unable to connect to printers – especially multiple models of Zebra label printers – after installing KB5004945 patch .

Microsoft has recognized this issue as a known issue that can be resolved by rolling back the patch or reinstalling the printer as an administrator.

In a statement to The edge, Zebra acknowledged the issue and said Microsoft plans to release an updated patch within the next few days to resolve the issue.

We are aware of a printing issue caused by the Windows “KB5004945”

; July 6 update that is affecting several brands of printers. Microsoft has investigated this issue and plans to release an update that resolves the issue within the next 1-2 business days. An immediate way to resolve this issue is to uninstall the Windows “KB5004945” update or to uninstall the affected printer driver and reinstall using administrative credentials. In the long run, we encourage the use of the newer Windows update that Microsoft plans to release. Customers who need help with Zebra printers can contact our technical support team.

The PrintNightmare issue is severe enough that Microsoft has already provided patches for all affected versions of Windows that it still supports (Windows 7, 8.1, and multiple versions of Windows Server in addition to Windows 10). However, at least one security researcher has shown a working exploit on fully patched systems that have Point & Print features enabled, so if you do not have a Zebra printer, install the update ASAP.

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