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The Windows update to fix ‘PrintNightmare’ made some printers stop working



The Windows update to fix ‘PrintNightmare’ made some printers stop working
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PRINTNIGHTMARE: As if an actively exploited major weakness in the Windows Print Spooler that allows someone to remotely take control of your machine wasn’t awful enough, some individuals who updated Microsoft’s security patch discovered that their printer connection stopped working. After installing the KB5004945 patch, many PCs couldn’t connect to printers — most notably many brands of Zebra label printers — in a near-repeat of an issue that occurred earlier this spring with a separate Windows 10 security update.

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

In a statement to The Verge, Zebra recognized the issue and stated that Microsoft aims to release an updated patch in the coming days that will fix the problem.

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We’re aware of a printing problem caused by the July 6th Windows “KB5004945” update, which affects a variety of printer brands. Microsoft has looked into the problem and aims to deliver a fix in the next 1–2 business days. Uninstalling the Windows “KB5004945” update or uninstalling the problematic printer driver and reinstalling it using Administrative credentials is a quick fix. In the long run, we recommend installing the newest Windows update that Microsoft is going to issue.

Customers with questions about Zebra printers can reach out to our Technical Support Team.

Because the PrintNightmare problem is so serious, Microsoft has already released patches for all affected Windows versions that it still supports (Windows 7, 8.1, and several editions of Windows Server in addition to Windows 10). However, one security researcher has demonstrated a workable exploit on fully patched PCs with Point & Print functionality enabled, so if you don’t have a Zebra printer, you should get the update as soon as possible.

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