Intermittently failing to connect to internet via wireless

DB55

Hi guys I have a dell inspiron 1520 with windows vista and it's been giving me trouble connecting wirelessly for awhile now. I've proven that it's not the router or the wireless card thats causing this problem.
The main problem is that my laptop can see and identify the router, but when I click connect, it just reports that it can't connect to the internet:(
Also it works fine when wired, and sometimes when I remove the cable while its connected to the internet, it retains the connection and works perfectly. I've tried restarting the laptop in this case many times to see if the connection is still retained, and sometimes it connects straight away, and sometimes it doesn't

I've been trying to fix this for a good while now but nothing seems to work:(

Any help would be much appreciated,
Thanks

Overheal

Start>Cmd(Right Click - Run as administrator)

>ipconfig /flushdns
>ipconfig /renew

if that fails give us your ipconfig /all and your routers IP and DNS settings.

DB55

thanks for replying, okay so that doesn't seem to have worked, same again really, it retained the connection for a while and connected fine on its own for afew hours, but failed to do so after that...:(


Windows IP Configuration
Host Name . . . . . . . . . . . . : D-PC
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Wireless LAN adapter Wireless Network Connection 2:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel(R) WiFi Link 5100 AGN
Physical Address. . . . . . . . . : 00-1E-65-83-C9-10
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::69e8:ff39:d337:e783%14(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.6(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : 01 September 2009 20:41:41
Lease Expires . . . . . . . . . . : 01 September 2009 21:41:41
Default Gateway . . . . . . . . . : 192.168.1.254
DHCP Server . . . . . . . . . . . : 192.168.1.254
DHCPv6 IAID . . . . . . . . . . . : 234888805
DNS Servers . . . . . . . . . . . : 192.168.1.254
NetBIOS over Tcpip. . . . . . . . : Enabled
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Broadcom 440x 10/100 Integrated Controller
Physical Address. . . . . . . . . : 00-19-B9-85-52-D6
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::207a:c1e5:fdf3:8063%11(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.1(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : 01 September 2009 20:41:54
Lease Expires . . . . . . . . . . : 01 September 2009 21:41:54
Default Gateway . . . . . . . . . : 192.168.1.254
DHCP Server . . . . . . . . . . . : 192.168.1.254
DHCPv6 IAID . . . . . . . . . . . : 151001529
DNS Servers . . . . . . . . . . . : 192.168.1.254
NetBIOS over Tcpip. . . . . . . . : Enabled

Thanks

Mac daddy

Log into your router
http://192.168.1.254
Go into your wireless section
And change your default wireless channel.

Upgrade the drivers or the wireless nic
http://downloadcenter.intel.com/T8Clearance.aspx?sType=&agr=Y&ProductID=3062&DwnldID=17749&url=/17749/eng/ICS_Dv32.exe&PrdMap=&strOSs=156&OSFullName=Windows%20Vista%20Ultimate,%2032-bit%20version*&lang=eng

Third go into the properties of both the wired and wireless adapters, set the duplex settings to auto/auto

Any rules set up on your router?
such as cloning of mac address, filter by mac?

CrinkElite

sounds to me like your having encryption key problems , what are you using wep or wpa?

if you have not tried so already I would suggest checking you have the correct keys entered and that the hardware is compatible with your encryption method.

Overheal

is any other computer on the network trying to use .6 preferred>?