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Set CF to _not_ run as the shell

Click on Start | Run

Enter "regedit", hit ENTER

Navigate to:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon

Note the data element "Shell". It should currently be set to "Explorer.exe"

Modify the data element "Shell" to be:
"{your install drive}\{cf install directory}\centrafuse.exe" -nowarning -nolimit

If you installed CF with at the default location, it would end up looking like:

"C:\Program Files\Flux Media\Centrafuse\centrafuse.exe" -nowarning -nolimit

Close regedit

Cross your fingers, Reboot, and keep your finger's crossed!