[Robm1955]

Sometimes, after re-booting my pc, my network connections are lost, and I can't get on the internet. If I re-boot again, it returns. What's the problem, and how can I resolve it?

[JohnWill]

Please supply the following info, exact make and models of the equipment please.

Name of your ISP (Internet Service Provider).
Make and exact model of the broadband modem.
Make and exact model and hardware version of the router (if a separate unit).
Make and exact model and hardware version of any other network equipment, like a repeater, a booster, hi-gain antenna, etc.
Model numbers can usually be obtained from the label on the device.
Connection type, wired or wireless.
If wireless, encryption used, (none, WEP, WPA, or WPA2)
Version and patch level of Windows on all affected machines, i.e. XP (Home or Pro), SP1-SP2-SP3, Vista (Home, Business, Ultimate), etc.
The Internet Browser in use, IE, Firefox, Opera, etc.




Please give an exact description of your problem symptoms, including the exact text of any error messages.

• If you're using a wireless connection, have you tried a direct connection with a cable to see if that changes the symptoms?
• For wireless issues, have you disabled all encryption on the router to see if you can connect that way?
• For wireless laptops, have you made SURE the wireless switch is on?
• For wired connection issues, have you booted in Safe Mode with Networking to see if that changes the symptoms?
• Have you connected directly to the broadband modem to see if this is a router or modem/ISP issue?
• If there are other computers on the same network, are they experiencing the same issue, or do they function normally?

On any affected computer, I'd also like to see this:

Hold the Windows key and press R, then type CMD (COMMAND for W98/WME) to open a command prompt:

Type the following commands on separate lines, following each one with the Enter key:

PING 74.125.45.100

PING yahoo.com

NBTSTAT -n

IPCONFIG /ALL

Right click in the command window and choose Select All, then hit Enter.
Paste the results in a message here.

If you are on a machine with no network connection, use a floppy, USB disk, or a CD-RW disk to transfer a text file with the information to allow pasting it here.

[Robm1955]

I am on Sky broadband. I connect using a Advent ethernet adaptor, so I have no encryption. The router is a Netgear, but does not have a model name, it just says 'SKY' on the front. I am running Vista Home Premium, and use Firefox to access the net. Here is the report you asked for :-

Microsoft Windows [Version 6.0.6002]
Copyright (c) 2006 Microsoft Corporation. All rights reserved.

C:\Users\Rob>PING 74.125.45.100

Pinging 74.125.45.100 with 32 bytes of data:
Reply from 74.125.45.100: bytes=32 time=126ms TTL=54
Reply from 74.125.45.100: bytes=32 time=130ms TTL=54
Reply from 74.125.45.100: bytes=32 time=123ms TTL=54
Reply from 74.125.45.100: bytes=32 time=119ms TTL=54

Ping statistics for 74.125.45.100:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 119ms, Maximum = 130ms, Average = 124ms

C:\Users\Rob>PING yahoo.com

Pinging yahoo.com [209.191.93.53] with 32 bytes of data:
Reply from 209.191.93.53: bytes=32 time=152ms TTL=52
Reply from 209.191.93.53: bytes=32 time=169ms TTL=52
Reply from 209.191.93.53: bytes=32 time=153ms TTL=52
Reply from 209.191.93.53: bytes=32 time=148ms TTL=52

Ping statistics for 209.191.93.53:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 148ms, Maximum = 169ms, Average = 155ms

C:\Users\Rob>NBTSTAT -n

Local Area Connection:
Node IpAddress: [192.168.0.4] Scope Id: []

NetBIOS Local Name Table

Name Type Status
---------------------------------------------
HOME-PC <00> UNIQUE Registered
WORKGROUP <00> GROUP Registered
HOME-PC <20> UNIQUE Registered
WORKGROUP <1E> GROUP Registered
WORKGROUP <1D> UNIQUE Registered
..__MSBROWSE__.<01> GROUP Registered

C:\Users\Rob>IPCONFIG /ALL

Windows IP Configuration

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

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : NVIDIA nForce 10/100/1000 Mbps Ethernet
Physical Address. . . . . . . . . : 00-1D-72-AF-25-46
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::9537:1c68:dc0c:e24c%10(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.0.4(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : 23 October 2009 10:01:30
Lease Expires . . . . . . . . . . : 24 October 2009 22:01:30
Default Gateway . . . . . . . . . : 192.168.0.1
DHCP Server . . . . . . . . . . . : 192.168.0.1
DHCPv6 IAID . . . . . . . . . . . : 218109651
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-11-95-3D-3C-00-1D-72-AF-25-46

DNS Servers . . . . . . . . . . . : 192.168.0.1
NetBIOS over Tcpip. . . . . . . . : Enabled

Tunnel adapter Local Area Connection* 6:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : 02-00-54-55-4E-01
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Local Area Connection* 7:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

C:\Users\Rob>

As I said, most of the time, everythings fine. It's just after re-booting, but it doesn't always happen.

[JohnWill]

We need to see the diagnostics when you have the problem. This looks fine, but that only tells us it's working.

[Robm1955]

Okay, I haven't re-booted for a while, but today when I did, I lost connection again. Here's the information you asked for.

Microsoft Windows [Version 6.0.6002]
Copyright (c) 2006 Microsoft Corporation. All rights reserved.

C:\Users\Rob>PING 74.125.45.100

Pinging 74.125.45.100 with 32 bytes of data:
PING: transmit failed, error code 1231.
PING: transmit failed, error code 1231.
PING: transmit failed, error code 1231.
PING: transmit failed, error code 1231.

Ping statistics for 74.125.45.100:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

C:\Users\Rob>PING yahoo.com
Ping request could not find host yahoo.com. Please check the name and try again.


C:\Users\Rob>NBTSTAT -n
NetBT is not bound to any devices
C:\Users\Rob>IPCONFIG /ALL

Windows IP Configuration

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

Tunnel adapter Local Area Connection* 6:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : 02-00-54-55-4E-01
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

C:\Users\Rob>

I'm now connected, but there still must be a problem.

[JohnWill]

This looks like a driver or hardware issue. I'd reload the drivers and if that doesn't work, consider a different NIC.

[Robm1955]

When you say reload, do you mean update? And what is the NIC?

[JohnWill]

NIC - Network Interface Card.

I actually would go into Device Manager and uninstall the NIC, reboot and rebuild the network from scratch. Sometimes that will fix things that normal configuration fails to correct.