Yeah, I caught that xupiter thing on my system. I had to run ad aware, then immediately shut down, boot to safe mode command prompt, physically delete the xupiter directory. Because the xupiter program keeps those dlls open so you cannot delete them.
Big pain in the ^$&$%& it was. Id like to get in on that class action suit.
Manual removal
(from
http://allentech.net/parasite/Xupiter.html )
Open the registry (from the Start menu, click Run and enter regedit) and find the key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run. Delete the 'XupiterStartup' entry.
Open a DOS command prompt window (Start->Programs->Accessories) and enter the following commands to deregister the toolbar.
cd "%WinDir%\System"
regsvr32 /u "C:\Program Files\Xupiter\Updates\XupiterToolbar.dll"
regsvr32 /u "C:\Program Files\Xupiter\Updates\XTUpdate.dll"
regsvr32 /u "C:\Program Files\Xupiter\Updates\XTSearch.dll"
(If your Program Files folder is something other than 'C:\Program Files' - for example because you have installed on a different drive or you are using a non-English version of Windows, you will have to change the commands accordingly. You may also not need the last line, if you have an older version of the software without the XTSearch.dll file, so do not worry if this command gives an error.)
Restart the computer and you should be able to delete the Xupiter folder in Program Files. You can now restore your home page (Internet Options->General->Home page) and your search settings (Internet Options->Programs->Reset web settings). You can also delete the registry keys HKEY_CURRENT_USER\Software\Xupiter and HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Code Store Database\Distribution Units\{A27CFCAE-9351-4D74-BFFC-21EB19693D8C} to clean up if you wish.