Hi Don,
If that doesn't work there and no-one else here can help, are two things you can try.
Post the same question in the ''Computer help'' forum, link on the left. Make sure you follow the message TIP and give details of your computer. Someone there may have an idea.
If that fails, download and run a program called HijackThis. This is what Download.com says about HijackThis, (HJT);
''This tiny program examines vulnerable or suspect parts of your system, such as browser helper objects and certain types of Registry keys. Pressing the Scan button generates a log of dozens of items, most of which are just customizations. Don't check off an item and hit the Fix checked button unless you're sure it's malware. Clicking Info on selected item tells you why the entry was flagged as suspicious, but not whether it's actually malware. To find that out, search the Web for that item's name or go straight to a forum, such as SpywareInfo or Computer Cops. Saving the log creates a text document you can post to these forums.
The latest version adds powerful tools to the Config window. The process manager and hosts file editor help you excise virulent infections. The unique ADS Spy tool scans for alternate data streams, which some browser hijackers use to hide from spyware removers. The program still installs into whatever directory in which you unzip the file, which can make it hard to locate. HijackThis is a serious tool for any user who needs to root out a serious infestation, but wield it with caution.''
Now, like the review says, this is a very powerful program and I suggest you do not try and analyse the log it produces yourself. The members in these forums do not have the time to analyse HJT logs and so you need to find a technical forum where they can and are willing to analyse it for you.
To help you, the Moderators in the Virus and Security alerts forum have given a list of sites and more information in this thread;
http://reviews.cnet.com/5208-6132-0.html?forumID=32&threadID=107213&messageID=1223125
Good luck.
Mark