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Microsoft Pri0

Welcome to Microsoft Pri0: That's Microspeak for top priority, and that's the news and observations you'll find here from Seattle Times technology reporter Matt Day.

September 30, 2011 at 10:58 AM

Microsoft fixes security update that some users said removed Google Chrome

A thread on the Google Chrome Help forum this morning included a number of the browser’s users who said they no longer had the browser on their computers after acting on a Microsoft Security Essentials notification.

Microsoft’s Security Essentials, an anti-virus/security software that the company offers, apparently misidentified Chrome as a password-stealing trojan (identified as PWS:Win32/Zbot) that monitors visits to certain websites.

Microsoft has since offered this update and fix on its Malware Protection Center page:

“On September 30th, 2011, an incorrect detection for PWS:Win32/Zbot was identified. On September 30th, 2011, Microsoft released an update that addresses the issue. Signature versions 1.113.672.0 and higher include this update.”

The company also issued this statement this morning:

“On September 30th, 2011, an incorrect detection for PWS:Win32/Zbot was identified and as a result, Google Chrome was inadvertently blocked and in some cases removed from customers’ PCs. We have already fixed the issue — we released an updated signature (1.113.672.0) at 9:57 a.m. PDT — but approximately 3,000 customers were impacted. Affected customers should manually update Microsoft Security Essentials (MSE) with the latest signatures. To do this, simply launch MSE, go to the update tab and click the Update button, and then reinstall Google Chrome. We apologize for the inconvenience this may have caused our customers.”

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