Well... removing Daemon Tools does not remove the driver that it uses and it has, on more than one ocasion, caused a lot of problems.
To remove SPTD:
1. Go to http://www.duplexsecure.com/downloads/
2. Download the SPTD for your system... either 32 bit or 64 bit... and save it on your desktop.
3. Click Start and type "cmd" and the right click on "cmd.exe" and select Run as Administrator.
4. Go to the folder where you downloaded SPTD and run it. When the dialog appears select Uninstall.