The Cipher strength is okay, all the IE settings are okay. I even went to the Dell website and did their recommendations still nothing. From what I've seen on the web the most common solution is to reinstall windows XP. Don't really want to do that but may not have a choice.
One of our computers at work had this issue as well. I posted to another forum, before I found this one, and they helped me out, but I can't remember everything they had me do. It will not necessarily be easy depending on your computer skill level, but it is going to require a HiJackThis log. CleanUp is another program that I've found useful, here is the link for it: www.stevengould.org/software/cleanup.
I'm having the same problem with two of the computers within our company, we have about 35 total. Secure sites won't come up at all. If you remember the link for Symantec please post it, this seems to be happening a lot.
