Reset your winsock and TCP/IP stack
Open Network settings
1.) Remove all protocols EXCEPT the Network Interface card.
2.) Click Apply & Close the Properties box, but on reboot notice, hit
Cancel...do not reboot!
3.) Open Regedit and delete these keys:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\VXD\Dhcp
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\VXD\Dhcpoptions
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\VXD\MSTCP
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\VXD\Winsock2
also ..scroll down delete
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Winsock2
close regedit
4.) Open Network Properties again, and Click ADD - PROTOCOL -
MicroSoft/TCPIP(should Add Client for MS Networks Automatically)
have your windows CD ready or the CAB files,
Reboot and Should be good.
NOTE: Simply removing the Protocols in Network settings will not work
because those registry entries stay, even if you have no network at all.
Once deleted, putting the TCP/IP protocol back in , basically rebuilds the
TCP from scratch, it is the same as when Windows was first installed clean.
also any speed patches to TcpRWin values & MTU will be reset back to Windows
defaults.