Amazing how such simple questions generate long answers....

OK, Black Vipers has here list of services Go through them and see what is excess. If you have services running in task manager that are not listed there, then post them here and/or look them up using google. You may find the norton left a few behind.

Check the link I gave earlier about how to check for spyware. When you are happy you have gone as far as you can, again, from the link above, run a hijack this log and post it here. We can take a look at what's left over.