Millions of Computers at Risk from Malware Infected CCleaner

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CCleaner image.

Cyber-security team Cisco Talos reports today that recently installed and updated versions of CCleaner (a computer performance optimization tool used to remove temporary internet files and repair registry errors) was infected with malware.

With over 2 billion worldwide downloads, it’s important that you ensure that your computer is not affected by this CCleaner breach.

The malware came with an official app, hosted on an official server. Everyone who installed or updated CCleaner between August 15 and now should update to the newest version and run an anti-malware scan.

While the malware doesn’t do much damage on its own, it opens a door for hackers to remotely install other malware on your computer.

Please do one of the following at your earliest convenience:

1. Call 800-919-6373 or – if you’re a Nerds customer – click the Nerds icon on your desktop. Our support team will confirm that your version of CCleaner isn’t infected and update your software to the newest version.


2. Follow these steps to confirm that your version of CCleaner isn’t infected:

Open CCleaner.

Look for the version number listed just below CCleaner Free in the upper left corner.

Versions 5.33.6162 and CCleaner Cloud version 1.07.3191 were infected.

Update your CCleaner software to version 5.34 or higher by downloading the update here.

If your version of CCleaner was one of the compromised versions, update your anti-malware software and run a full scan.

If you have any questions, please don’t hesitate to give us a call at 800-919-6373. Your friendly neighborhood Nerds are here to help!

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About The Author: Andrea Eldridge is CEO and co-founder of Nerds On Call, a computer repair company that specializes in on-site and online service for homes and businesses. Andrea is the writer of a weekly column, Nerd Chick Adventures in The Record Searchlight. She prepares TV segments for and appears regularly on CBS, CW and FOX on shows such as Good Day Sacramento, More Good Day Portland, and CBS 13 News, offering viewers technology and lifestyle tips. See Andrea in action at