Connected but can't open anything in a browser

So, when I try to connected to a public wireless network my computer starts "acquiring network address", and this is what the status says during connecting:
After that for a second it says Limited or no connectivity and then it says this:
When I try to open a page in a browser I get this:

Error 105 (net::ERR_NAME_NOT_RESOLVED): Unable to resolve the server's DNS address.

I tried renewing my IP address in CMD and I got this:

C:\Documents and Settings\Nesa>ipconfig /renew
Windows IP Configuration

No operation can be performed on Local Area Connection while it has its media di
sconnected.
An error occurred while renewing interface Wireless Network Connection : unable
to contact your DHCP server. Request has timed out.

After that I used the command ipconfig /all to see if PC found the DHCP server and I got this:

Windows IP Configuration

Host Name . . . . . . . . . . . . : rs
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Unknown
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection:

Media State . . . . . . . . . . . : Media disconnected
Description . . . . . . . . . . . : NVIDIA nForce Networking Controller
Physical Address. . . . . . . . . : 00-04-61-75-AB-59

Ethernet adapter Wireless Network Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Wireless G USB Adapter
Physical Address. . . . . . . . . : D8-5D-4C-8E-80-73
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 192.168.1.3
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.1.1
DHCP Server . . . . . . . . . . . : 192.168.1.1
DNS Servers . . . . . . . . . . . : 192.168.1.1
Lease Obtained. . . . . . . . . . : Tuesday, August 21, 2012 12:17:50 PM

Lease Expires . . . . . . . . . . : Wednesday, August 22, 2012 12:17:50
PM

After that I tried pinging the DHCP server and I sent 4 packets, received 0, so 100% loss.
Does anyone know what should I do? I'm really desperate.

Deleted by poster. Irrelevant.