Vista - Preventing Hackers on my Wireless Network

The headers doesn't really explain what I need but I am at a loss for words here. What I really want to know is if there is a way to know how many people are connected on my network at the same time?

My PC is wired but the other 2 computers are running wireless. At some points, my browser crawls to a dial-up speed and I don't know if this is because someone else is running on my wireless network or not.

My thing really is not to see if I can make the intruders go away but more so if I can learn to see who is logged in at the time to start checking from there and make the necessary adjustments.

Thanks

What sort of password protection do you have WPA or WEP.

WPA is more secure because its much harder to crack. since it is made from a mixture of words and numbers, hackers would need a very long time to crack your network. WEP Is just numbers, you cant guess them , but in my opinion is easy to crack.

Also have a look at this Cnet Article

Hope this Helps

I am using WEP because I was having issues with my wireless software keeping WPA connected at times but this was a long time ago, I am going to try to change this to see if this helps a bit.

I was more interested on knowing who was connected though so I think that article might help me better.

Thanks a lot