Ping/DNS OK, No other TCP/IP Connection!

We have a laptop with Windows XP home on it.

I am able to ping other computers reliably from the command line. The machine will alse do DNS lookups (via ping and nslookup).

However, no program seem to be able to connect to another machine.

I have tried to use telnet to connect to 80, 90, 22, 25, 20, etc on our servers with no luck. Telnet takes about 10 seconds and then returns with an “unable to connect” message.

If I REBOOT into safe mode with Networking, THERE IS NO PROBLEM!

I have turned off the firewall, antivirus, etc. Nothing seems to work. I went through and turned off each running service down to the bare minumum, checking the connection after each one. Nothing.

The machine is XP SP2. NAV 2003 is installed, but turned off.

Any ideas?