Can not change default gateway(URGENT!!!)



Everytime after reboot my PC, the default gateway is set to 10.64.x.x in the
TCP/IP properities(correct default gateway should be 10.128.x.1). I was try
the following actions:
1. Enable DHCP, my PC can get correct IP, DNS & WINS address, but the
default gateway is still set to 10.64.x.1.
2. Use static IP, but after reboot, all static IP, DNS & WINS address are
gone, only see the default gateway is 10.64.x.1 in TCP/IP properities.
3. run "netsh interface reset *", it's still not work after reboot.
4. Remove LAN adapter and reinstall it, still not work after reboot.
5. delete Winsock &Winsock32 from the Registry, still not work after reboot.
6. remove default gateway 10.64.x.1 under active LAN adapter from the
Registry, it's working before reboot, and not working after reboot.
7. delete all entries in
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run, still not
work.

In other words, if I change the default gateway manually, it's working. But,
it will change back to 10.64.x.1 every time after reboot. It's seems that a
program will overwrite the default gateway every time at Windows startup
point.

My PC's config.:
- IBM Thinkpad T42
- Intel Pro/1000 MT mobile connection with latest driver
- Windows XP pro with SP2(Firewall disabled)
- Macafee anti-virus
- ctrixic client
- blackberry desktop program
- Other common applications such as MS Office 2000.

Any Idea?
.



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