I am having the EXACT same problem. Here's my IPConfig:
Here is before I unticked the IPv6:
Wireless LAN adapter Wireless Network Connection:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek RTL8187B Wireless
802.11b/g 54Mbp
s USB 2.0 Network Adapter
Physical Address. . . . . . . . . : 00-16-44-14-D5-F8
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::5d32:a675:4d6d:
6387%9(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.5(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Saturday, April 05, 2008
9:38:15 PM
Lease Expires . . . . . . . . . . : Sunday, April 06, 2008 9:38:14
PM
Default Gateway . . . . . . . . . : 192.168.1.1
DHCP Server . . . . . . . . . . . : 192.168.1.1
DNS Servers . . . . . . . . . . . : 192.168.1.1
NetBIOS over Tcpip. . . . . . . . : Enabled
Now this was done after I unticked the IPv6.
Wireless LAN adapter Wireless Network Connection:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek RTL8187B Wireless
802.11b/g 54Mbp
s USB 2.0 Network Adapter
Physical Address. . . . . . . . . : 00-16-44-14-D5-F8
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IPv4 Address. . . . . . . . . . . : 192.168.1.5(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Saturday, April 05, 2008
9:38:15 PM
Lease Expires . . . . . . . . . . : Sunday, April 06, 2008 9:38:15
PM
Default Gateway . . . . . . . . . : 192.168.1.1
DHCP Server . . . . . . . . . . . : 192.168.1.1
DNS Servers . . . . . . . . . . . : 192.168.1.1
NetBIOS over Tcpip. . . . . . . . : Enabled
I am connecting to a NetGear Wireless G Hardware Version 7 Router.
Never ever had a problem before SP1 and nor do any of the other
wireless devices I have in my house that do not use Vista.