i had the message of limited or no connectivity on desktop and couldn't connect to internet but why is it that i can connect to my wireless laptop and now today its says i have newtork cable unplugged but still can use laptop i talked to comcast for 2 hours and they couldn't fix it so i'm completely lost any suggestions? thanks

are you using a router?
It could be the cable (UTP cable) connecting the router to your PC is the problem. Try to plug it on another Ethernet port of your router. Check your RJ-45 connectors on both ends of the cable, it might be loose. Or, if you have an extra UTP cable, try changing it.

I assumed, both your Desktop and laptop are connected on the same gateway/router. If your laptop has no problem at all connecting to the internet, the problem lies between the desktop and your gateway/router.

It is also, better, if you tell us what comcast had suggested on you, so we can come up with (maybe) some other solutions, besides the one they suggested.

Lets renew your connection to the gateway.

1. Go to Start -> Run.
2. In the Box, type in "cmd".
3. A black box will appear. Type in: "ipconfig /release".
4. After it is done releasing. Type in: "ipconfig /renew".
5. This should renew your connection with your gateway.

I'd like to see some more information. Please follow the steps below.

1. Go to Start -> Run.
2. In the Box, type in "cmd".
3. A black box will appear. Type in: "ipconfig /all".
4. A lot of information will appear, Please right click the black window and hit mark.
5. Select every line of text you recieved and hit "enter" to copy.
6. Then paste it into your next reply.

Regards,
Olrik

Microsoft Windows XP [Version 5.1.2600]
© Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\Tim>ipconfig/all

Windows IP Configuration

Host Name . . . . . . . . . . . . : D4YJH6B1
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Wireless Network Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Belkin Wireless G USB Network Adapte
r
Physical Address. . . . . . . . . : 00-17-3F-52-35-33
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. . . . . . . . . . : Monday, July 07, 2008 7:52:01 PM
Lease Expires . . . . . . . . . . : Tuesday, July 08, 2008 7:51:57 PM

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel® PRO/100 VE Network Connecti
on
Physical Address. . . . . . . . . : 00-13-72-D7-99-F7
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Autoconfiguration IP Address. . . : 169.254.68.201
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . :

C:\Documents and Settings\Tim>

the machine you ran this Ipconfig /all on should work on the internet through wireless.
After you refreshed / renewed did you still experience these problems?

Regards,
Olrik