Troubleshooting the Internet Explorer Address bar

I was stumped yesterday when a client complained that his internet explorer browser would no longer let him type a web site into the address bar using the format XYZ.COM, but instead had to type the format http://WWW.XYZ.COM for the address bar to work.  I could not figure out why.  Obviously this is a great inconvenience having to type the entire web address and protocol.

His Dell machine is "clean" no hijackers, etc.  It uses windows xp home.

I have run SFC /scannow and tried unchecking the Internet Explorer app in the ADD/REMOVE Programs, and then re-checking the box.

None of this has worked.  Any ideas gentlemen?

Thanks in advance.

Michael
20computerAsked:
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SaineolaiCommented:

This issue can be caused by one of the latest security updates from Microsoft.  Check this URL

http://support.microsoft.com/kb/918165

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Rob WilliamsCommented:
Is it happening to all sites or just a couple?
www.xyz.com should resolve without the http:// but some sites (not too many) require the www, or prefix such that xyz.com will not work. It depends on the domain registration.
Just a thought.
Craig_200XCommented:
Heres a quick fix

...download this and double click it - select YES to merge it into the registry

http://www.mvps.org/winhelp2002/RepairDefaultPrefix.reg

this will repair file associations for http
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20computerAuthor Commented:
Thank you for your responses.  Saineolai seems to be onto something since the patch is very specific regarding the HP Scanner Photo Share sofware which my client has installed.  I will implement Monday and let you all know if it worked.  I will try Craig's suggested registry fix if Saineolai's fails.  Thank you RobWill for the input; yes the issue occurs with all addresses.  Check back on May 1, 2006.

Michael
20computer
20computerAuthor Commented:
I was premature in my "clean machine" assessment guys.  After a more thorough inspection, a process was noticed that had been missed which was named TASKDIR.DLL.  Removal of this trojan, additional files with the same timestamp, and related rootkit, resulted in the problem being solved.  Cause and effect?  I can't be sure so I decided to split the points between two intelligent and informed answers.  Thanks again for your help.

Michael

20computer
Rob WilliamsCommented:
Thanks  20computer,
--Rob
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