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Why can't I use the Yahoo! search function? I get the following message: "Bad Request (Invalid Hostname)"


I cannot search on Yahoo! but Google works fine (inasmuch as you can trust Google)

The simplest of searches yields "Bad Request (Invalid Hostname)" on the first try. I have gone through Yahoo!'s trouble shooting process w/o results.

Additional System Details

Sites Affected


Installed Plug-ins

  • Google Talk Plugin Video Accelerator version:
  • Version
  • Adobe PDF Plug-In For Firefox and Netscape
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • Google Update
  • BrowserPlus -- Improve your browser! -- http://browserplus.yahoo.com/
  • Shockwave Flash 10.0 r42
  • iTunes Detector Plug-in
  • GEPlugin
  • Next Generation Java Plug-in 1.6.0_23 for Mozilla browsers
  • Yahoo Application State Plugin version
  • 4.0.60310.0
  • Motive Plugin for Mozilla Browsers
  • BlackBerry WebSL Browser Plug-In


  • User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0.1) Gecko/20100101 Firefox/4.0.1

More Information

I've tried all the Yahoo! help suggestions to no avail.

  • Top 10 Contributor
  • Moderator
10738 solutions 96605 answers

Clear the cache and the cookies from sites that cause problems.

"Clear the Cache":

  • Tools > Options > Advanced > Network > Offline Storage (Cache): "Clear Now"

"Remove the Cookies" from sites causing problems:

  • Tools > Options > Privacy > Cookies: "Show Cookies"

Question owner

Yahoo search engine still doesn't work, and Google does. Other programs on my computer are:

Norton Internet Security; Norton Utilities; Verizon In-home agent; (I don't use it, but have a Verizon wireless router); Windows Explorer (I reset it but still can't use Yahoo search even though Google works fine)

I am paranoid that some how the evil Google has sabotaged Yahoo search! HELP!!!

Modified by stalav