You can and should uninstall them through Add/Remove programs, do not just delete them. You can e-mail Symantec and ask for links to full removal tools, if you prefer. Otherwise, after uninstalling these applications, go to Start/Find and type Symantec, then delete all the findings. After that go to Start/Find and type Norton, and then delete all these findings. If you are happy to look into the registry, then go to Start/Run then type regedit. When the registry opens, click onto File and select EXPORT. Then give the export a name, the obvious name is Registry, and export to a safe place like My Documents. Then open HKEY_Current user/Software, and look for Norton and Symantec, deleting any entries. Then open HKEY_LOCAL_MACHINE and do the same. Close the registry Editor. This should have done the trick and got rid on Norton for you. DO NOT at this stage do anything with the exported registry. Leave this folder for several days until you are positive that you have not made any errors. Should anything NOT be running right on your computer, double click this folder and select Re-merge, this will return things to the previous settings.