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Strange non-fatal message when Firefox 6.02 starts in Win XP Pro x64


Since updating to version 6.02, a non-fatal message appears when starting Firefox. Message is: "Using registry key: Software\AppDataLow\1fd1c56". Clicking "OK" results in Firefox loading. Frequent page redirects to random sites. No change after backing up profile with Mozbackup 1.51, uninstalling/reinstalling Firefox, then restoring profile from Mozbackup. Modest improvement after regedit deletion of registry key, but it reappears. Malwarebytes found and removed Win32:Adrotator, but problem persists.

Modified by LeRoy3rd

Additional System Details

This happened

Every time Firefox opened

This started when...

after updating Firefox to 6.02

Installed Plug-ins

  • Google Talk Plugin Video Accelerator version:
  • Version
  • Coupons, Inc. Coupon Printer Plugin
  • Adobe PDF Plug-In For Firefox and Netscape 10.1.0
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • ActiveTouch General Plugin Container Version 105
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • Shockwave Flash 10.3 r183
  • npmnqmp 989898989877
  • Google Update
  • Adobe Shockwave for Director Netscape plug-in, version
  • GEPlugin
  • Picasa plugin
  • Next Generation Java Plug-in 1.6.0_26 for Mozilla browsers
  • Yahoo Application State Plugin version
  • 4.0.60531.0
  • Windows Presentation Foundation (WPF) plug-in for Mozilla browsers


  • User Agent: Mozilla/5.0 (Windows NT 5.2; WOW64; rv:6.0.2) Gecko/20100101 Firefox/6.0.2

More Information

elmo7sharp9 0 solutions 1 answers

Helpful Reply

On Firefox 7.0.1 on Windows XP, I found a mysterious "z" addon that was causing the problem. The "z add-on" doesn't have an Uninstall feature, so I typed "about:support" in the address bar and looked up the extension ID. I then deleted the folder "C:\Program Files\Mozilla Firefox\Extensions\<Extension ID>" and restarted Firefox. The add-on was gone and so was the problem!