Hacker?

I am using a Windows XP Media Center Laptop with McAfee Security Center installed and connecting to my home network on a Belkin Wireless G+MIMO router. When I uncheck "Don't allow exceptions" in the Windows Firewall window and click "apply", I get a notification saying I am connected via an internet gateway to "readytodelete", which is a computer who is downloading data from my laptop at 512kbps that I can neither disconnect from nor disable. Also, when I checked my router settings, I found an unknown MAC address (belonging to an Apple computer) with no name joined to my network.

The only reason I uncheck the "Don't allow exceptions" tab is so I can use my iPod Touch as a remote control for iTunes on my laptop, as otherwise it won't connect.

When I re-check the "Don't allow exceptions" tab and turn the wireless off and back on, the "readytodelete" connection disappears.

I don't have a clue as to what to do about this so any help and advice is greatly appreciated.

If you need any more info, let me know and I'll post it up.

Thanks,

Luke Vega

Ok, the "don't allow exceptions" is in the Windows Firewall section in Control Panel.

I have security enabled on my network:

Security Mode WPA-PSK(no server)
Authentication WPA-PSK
Encryption Technique TKIP
Pre-shared Key (PSK) (I have set a password)

There is a utility to block MAC addresses and I have the unknown MAC address listed, but it still appears as connected in my DHCP Client List...

Also, because this laptop is a Media Center, it shouldn't be able to connect to another computer, as the networking function is disabled by Microsoft on Media Centers.

Anyone have any other advice?