Open the registry (from the Start menu, click Run and enter regedit) and find the key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Curr
entVersion\Run. Delete the 'XupiterStartup' entry in the Right Hand pane.
Also delete the following Registry Keys:
HKEY_CURRENT_USER\Software\Xupiter
HKEY_LOCAL_MACHINE\Software\Microsoft\Code Store Database\Distribution Units\{A27CFCAE-9351-4D74-BFFC-21EB19693D8C}
Reboot, and delete the entire Program Files\Xupiter directory.
You're also likely to have a Xupiter ActiveX object in your Downloaded Program Files folder. Find that one, rightclick it, and choose properties. It has the following ID: {A27CFCAE-9351-4D74-BFFC-21EB19693D8C}
Now rightclick the file, and choose delete.
Next, delete the Xupiter folder in Program Files.
Finally, go to Internet Options/Programs, and hit "Reset Web Settings".