Windows Update - Page Cannot Be Displayed

I had an infection with sdbot.m trojan.  A number of things stopped working - antivirus (eTrust EZ) seemed to load on startup, but couldn't open the program to run a scan, also couldn't update signatures - any web page which contained a virus-connected word (e.g. scan, monitor, update) closed IE immediately - programs like stinger, housecall, wouldn't run - Windows Update wouldn't work either.  After dealing with sdbot, (by running stinger from a command prompt) everything returned to normal, except Windows Update.  This still comes up with the "Page Cannot Be Displayed" message.  I have, I think, clicked all the Restore Defaults buttons, changed many settings then changed them back when it still wouldn't work, followed the instructions in Microsoft Knowledgebase article 243787, but problem won't go away.  Adware/trojan removers don't find anything.  I have even re-installed Windows (XP Home) as an upgrade.  What have I missed?
alan5858Asked:
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CoolATIGuyConnect With a Mentor Commented:
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CoolATIGuyCommented:
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alan5858Author Commented:
I have reinstalled using sfc /scannow, and a Windows reinstall from XP disk.
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alan5858Author Commented:
Tried the Symantec link, no progress.  However the new Windows update site did work.  Probably never know what the base problem was, but I can now update.  Thanks for that.
Alan
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CoolATIGuyCommented:
Welcome...glad you can at least update. :-)

CoolATIGuy
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alan5858Author Commented:
Final answer turned out like this.  Virus added some addresses in the HOSTS file which misdirected traffic to various antivirus sites (Trendmicro, Symantec, eTrust, etc), also Window Update.    Deleting these entries solved it all.
Thanks to those who helped.
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CoolATIGuyCommented:
*smack* should have thought of the Hosts file... :-P  Sorry.

CoolATIGuy
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