Norton 360 renewal

problem with new 360 and hope you can help.

 

i have recently purchased norton 360 to renew from existing software installed on my computer. when i try to run the cd i get an error message saying that norton internet security must be uninstalled before i continue. i am given a link to "add/remove programs" but there are no norton (or symantec) programs listed. the only one i can see is "live reg(symantec corporation)". if itry to uninstall this it says no as it is being used by norton internet security.

 

very frustrating but can anyone give me any pointers ????