Tip & How-To about Computers & Internet

How to check if you are connected to a usable network..

On any Windows device there is a set of protocols called TCP/IP.
When your device connects to a network, it attempts to obtain a TCP/IP network address that means it can connect to other devices on the network, or the Internet.
If it CANNOT obtain an address, you cannot do anything at all.
The actual address you obtain is set by the network administrator, but there is a way to tell if the network is not giving you a "real" address!
Windows 95 or 98 "start", "run" type in "cmd", then in the window that appears type "winipcfg"
Windows 2000 or later, "start", "run" type in "cmd", then in the window that appears type "ipconfig"
Both will give you screens of information that you can scroll through; look for your network adapter, then the IP address. (in the format xxx.xxx.xxx.xxx)
If the address begins 169.254 then you have NOT got a usable network connection.

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find proxy server address


Changing TCP/IP settings Win 7 TCP/IP defines how your computer communicates with other computers.
To make it easier to manage TCP/IP settings, we recommend using automated Dynamic Host Configuration Protocol (DHCP). DHCP automatically assigns Internet Protocol (IP) addresses to the computers on your network, if your network supports it. If you use DHCP, then you don't have to change your TCP/IP settings if you move your computer to another location, and DHCP doesn't require you to manually configure TCP/IP settings, such as Domain Name System (DNS) and Windows Internet Name Service (WINS). To enable DHCP or change other TCP/IP settings, follow these steps:
  1. Open Network Connections by clicking the Start button 4f6cbd09-148c-4dd8-b1f2-48f232a2fd33_818.jpg, and then clicking Control Panel. In the search box, typeadapter, and then, under Network and Sharing Center, click View network connections.
  2. Right-click the connection that you want to change, and then click Properties. 18abb370-ac1e-4b6b-b663-e028a75bf05b_48.jpg If you're prompted for an administrator password or confirmation, type the password or provide confirmation.
  3. Click the Networking tab. Under This connection uses the following items, click either Internet Protocol Version 4 (TCP/IPv4) or Internet Protocol Version 6 (TCP/IPv6), and then click Properties. 25e7e385-9327-4f7d-aab0-afa5aaf952ba_49.jpgThe Network Connection Properties dialog box
  4. To specify IPv4 IP address settings, do one of the following:
    • To get IP settings automatically using DHCP, click Obtain an IP address automatically, and then click OK.
    • To specify an IP address, click Use the following IP address, and then, in the IP address, Subnet mask, and Default gateway boxes, type the IP address settings.
  5. To specify IPv6 IP address settings, do one of the following:
    • To get IP settings automatically using DHCP, click Obtain an IPv6 address automatically, and then click OK.
    • To specify an IP address, click Use the following IPv6 address, and then, in the IPv6 address, Subnet prefix length, and Default gateway boxes, type the IP address settings.
  6. To specify DNS server address settings, do one of the following:
    • To get a DNS server address automatically using DHCP, click Obtain DNS server address automatically, and then click OK.
    • To specify a DNS server address, click Use the following DNS server addresses, and then, in the Preferred DNS server and Alternate DNS server boxes, type the addresses of the primary and secondary DNS servers.
    f598cd96-6bf9-47be-942d-7d0b0afdbd88_47.jpgThe Internet Protocol Version 4 (TCP/IPv4)Properties dialog box
  7. To change advanced DNS, WINS, and IP settings, click Advanced.

Mar 10, 2014 | Dell Latitude D600 Notebook

1 Answer

no network coverage


Set IP Address Configuration
Click the "Start" button and select the "Control Panel" from the right column to open it.
Select the "Network and Internet" section of the Control Panel.
Click "Network Connections" if using Windows XP to view the available network icons.
Or, click "Network and Sharing Center" if using Windows 7 or Vista and select "Change adapter settings."


Right-click your network connection icon which displays either the yellow triangle or red "x" indicating limited or no connectivity.
Select "Properties."
Click on "TCP/IP" to select and highlight it. Click "Properties."
Select both the "Obtain IP address automatically" and "Obtain DNS server address automatically" radio buttons.
Click "OK" and then "Close" in the Network Connection Properties box. Close the Control Panel.
Manually Renew IP Address
Click the "Start" button and choose "Run" from the list.

Type "cmd" in the "Run" box and press "Enter" to open the Windows Command Prompt.

Type "ipconfig /release" in the Windows Command Prompt and press "Enter."
This releases the current IP address of your computer.
Type "ipconfig /renew" and press "Enter" to obtain a fresh IP address.
When renewing your IP address, Windows automatically attempts to connect to the network.
Powercycle Router and Modem
Turn off your computer.


Unplug both the Internet modem and wireless router's power adapter from the electrical outlet. Wait for two minutes.
Plug the Internet modem into the electrical outlet first. Wait for connectivity lights to appear.
Plug the wireless router's power adapter back into the electrical outlet.
Confirm that lights appear on the router indicating that it has established a connection to the modem.


Turn on your computer.
Open "Network Connections" if your computer does not connect automatically to the network.
Select a network from the list, input the network password if one exists and click "Connect."
Open your Internet browser to test the connection.
Update Network Interface Card (NIC) Drivers

Click the "Start" button. Right-click "My Computer" or "Computer" from the Start Menu. Select "Manage." Click "Yes" if a user account control message appears.


Click on "Device Manager" from the list of System Tools.
Find the "Network adapters" listing and click the "arrow" or "plus" symbol to expand it.

Right-click your computer's network adapter from the list and select "Properties."
Click the "Driver" tab and select "Update Driver."
Follow the on-screen prompts to allow Windows to find and install the drivers automatically. Restart the computer when the process is finished and attempt to re-connect to the network.
Reset Internet Protocol (TCP/IP)

Click the "Start" button and select "Run."
Type "cmd" and press "Enter" to open the Command Prompt.


Type the following line into the Command Prompt and press "Enter":
netsh int ip reset resetlog.txt
Close the Command Prompt. Issuing this command tells Windows to remove and then re-install the two registry keys used by the Internet Protocol (TCP/IP) component of Windows.


Restart the computer.
Attempt to connect to the network if a connection is not established automatically.


Sep 06, 2013 | Computers & Internet

1 Answer

cant connect to my wireless router and the 192.168.01 url entered doesnt help none


Windows XP
  1. Verify Ethernet adapter in device manger.
    1. Click Start > Search > Type in ncpa.cpl and press Enter.
    2. Click System>Hardware > Device Manager
    3. Click Network Adapters
    4. Verify adapter present, enabled, and no error messages.
    5. If error reported refer to OEM regarding error receiving
  2. Open the Network Connections window.
    1. Click on Start > Run > Type in ncpa.cpl and click OK.
  3. Double-click on the Local Area Connection icon.
  4. Click the Support tab.
    1. Ensure that Address Type: says "Assigned by DHCP."
    2. Ensure that the IP address is valid.
    3. If both are correct, click the Repair button and then skip to Step 9.
  5. If it does not say "Assigned by DHCP" click the General tab and then click Properties.
  6. Select "Internet Protocol TCP/IP" and then click on the Properties button.
  7. Ensure that the radio buttons are marked as "Obtain an IP Address automatically" and "Obtain a DNS Server address automatically" and click OK.
  8. Click OK again to close out of the Local Area Connection properties.
    1. Restart the system if any changes were made to the configurations.
  9. Right-click on Local Area Connection and select Repair.
  10. If the repair fails because the system is unable to flush the ARP Cache, the Routing and Remote Access service will need to be stopped and set to disabled.
    1. Click Start>Run>Type services.msc >Click OK.
    2. Double-click on Routing and Remote Access.
    3. Click the Stop button.
    4. Set Startup Type to Disabled and click Apply, then OK.
    5. Restart system.
  11. If the Repair fails to renew the IP address, ensure that all firewalls are disabled and try again.
  12. If it still fails, reset the networking protocols.
    1. Click Start>Run>Type CMD and click OK.
    2. Type netsh int ip reset reset.log and press Enter.
    3. Type netsh int ip delete arpcache and press Enter.
    4. Type netsh winsock reset and press Enter. (SP 2 or later)
    5. Type ipconfig /flushdns and press Enter.
    6. Restart the system.
Windows Vista
  1. Verify Ethernet adapter in device manger.
    1. Click Start > Search > Type in ncpa.cpl and press Enter.
    2. Click Hardware and Sound > Device Manager
    3. Click Network Adapters
    4. Verify adapter present, enabled, and no error messages.
    5. If error reported refer to OEM regarding error receiving
  2. Open the manage Network Connections window.
    1. Click Start > Search > Type in ncpa.cpl and press Enter.
  3. Right-click on Local Area Connection and select Properties.
  4. Uncheck Internet Protocol Version 6 (TCP/IPv6).
  5. Select "Internet Protocol Version 4 (TCP/IPv4)" and then click on the Properties button. (Do Not Uncheck Version 4).
  6. Ensure that the radio buttons are marked as "Obtain an IP Address automatically" and "Obtain a DNS Server address automatically" and click OK.
  7. Click OK again to close out of the Local Area Connection properties.
    1. Restart the system if any changes were made to the configurations, including unchecking TCP/IPv6.
  8. Right-click on Local Area Connection and select Diagnose.
  9. If Diagnose fails to renew the IP address, ensure that all firewalls are disabled and try again.
  10. If it fails again, choose to "Reset the Network Adapter."
  11. If it still fails, reset the networking protocols.
    1. Click Start>All Programs>Accessories.
    2. Right-click on Command Prompt and select "Run As Administrator"
    3. Type netsh int ip reset reset.log and press Enter.
    4. Type netsh int ip delete arpcache and press Enter.
    5. Type netsh winsock reset and press Enter.
    6. Type ipconfig /flushdns and press Enter.
    7. Restart the system.
Windows 7
  1. Verify Ethernet adapter in device manger.
    1. Click Start > Search > Type in ncpa.cpl and press Enter.
    2. Click Hardware and Sound > Device Manager
    3. Click Network Adapters
    4. Verify adapter present, enabled, and no error messages.
    5. If error reported refer to OEM regarding error receiving
  2. Open the manage Network Connections window.
    1. Click Start > Search > Type in ncpa.cpl and press Enter.
  3. Right-click on Local Area Connection and select Properties.
  4. Uncheck Internet Protocol Version 6 (TCP/IPv6).
  5. Select "Internet Protocol Version 4 (TCP/IPv4)" and then click on the Properties button. (Do Not Uncheck Version 4).
  6. Ensure that the radio buttons are marked as "Obtain an IP Address automatically" and "Obtain a DNS Server address automatically" and click OK.
  7. Click OK again to close out of the Local Area Connection properties.
    1. Restart the system if any changes were made to the configurations, including unchecking TCP/IPv6.
  8. Right-click on Local Area Connection and select Diagnose.
  9. If Diagnose fails to renew the IP address, ensure that all firewalls are disabled and try again.
  10. If it fails again, choose to "Reset the Network Adapter."
  11. If it still fails, reset the networking protocols.
    1. Click Start>All Programs>Accessories.
    2. Right-click on Command Prompt and select "Run As Administrator"
    3. Type netsh int ip reset reset.log and press Enter.
    4. Type netsh int ip delete arpcache and press Enter.
    5. Type netsh winsock reset and press Enter.
    6. Type ipconfig /flushdns and press Enter.
    7. Restart the system.
I hope this helps

Oct 01, 2010 | Computers & Internet

1 Answer

I am connected to verizon fios and then wired to a 8 port linysis to my office. I can not connect Now. It's been working fine for months. Now I get a yellow triangle. Limited or no connectivity


Let's check some settings for the network connections. Click on "start" - "settings" - "control panel" - "network connections".
First we'll check the ethernet connection. Right click on "local area connection" - "properties" - choose "Internet protocol (TCP/IP)" - "properties". In case of not at automatically settings click on both buttons to "obtain an IP address automatically" and "obtain DNS server address automatically".
Click on OK at both windows.
Now we'll check the Wi-fi connection. Right click on "Wireless connection" - "properties" - choose "Internet protocol (TCP/IP)" - "properties". In case of not at automatically settings click on both buttons to "obtain an IP address automatically" and "obtain DNS server address automatically".
Click on OK at both windows.

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Sep 18, 2010 | Linksys EtherFast 10/100 16-Port Workgroup...

1 Answer

dial up connection ends in error code 720, can't connect to the internet. Using a back-up pc that is terribly slow. would like to fix pc.


Error 720 - the connection attempt failed because your computer and the remote computer could not agree on PPP control protocol.

To resolve this issue, uninstall the TCP/IP protocol, remove the second WAN Miniport IP device, and then reinstall the TCP/IP protocol. To do so, follow these steps:
  1. Uninstall the TCP/IP protocol. To do so:
    1. In Control Panel, double-click Network and Dial-up Connections, right-click Local Area Connection, and then click Properties.
    2. Under Components checked are used by this connection, click Internet Protocol (TCP/IP), and then click Uninstall.
    3. Follow the on-screen instructions to uninstall TCP/IP.
    4. Restart the computer when prompted, but click No if you are prompted to allow Windows to enable a protocol.
  2. Right-click My Computer, and then click Properties.
  3. Click the Hardware tab, and then click Device Manager.
  4. On the View menu, click Show hidden devices.
  5. Under Network adapters, there should be no WAN Miniport IP devices. If a WAN Miniport IP device is listed, continue to the following step. If no WAN Miniport IP device is listed, go directly to step 16.
  6. Click Start, click Run, type regedit in the Open box, and then click OK.

  1. Locate the following registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002BE10318}
  2. On the Registry menu, click Export Registry File, type backup-key in the File name box, and then click Save.

    Note You can restore the changes that you make to this registry key. To do so, double-click the backup-key.reg file that you saved.
  3. Click each of the registry subkeys under this key, and then view the Data column of the DriverDesc value to determine which of the subkeys corresponds to WAN Miniport (IP). For example, the 0005 subkey.
  4. Right-click the subkey whose DriverDesc value data is WAN Miniport (IP) (for example, right-click 0005), and then click Delete. Click Yes to confirm that you want to delete the key.
  5. Quit Registry Editor.
  6. Right-click My Computer, and then click Properties.
  7. Click the Hardware tab, and then click Device Manager.
  8. On the View menu, click Show hidden devices.
  9. Under Network adapters, right-click WAN Miniport (IP) and then click Uninstall. Click OK to confirm that you want to remove this device.
  10. Reinstall the TCP/IP protocol. To do so:
    1. In Control Panel, double-click Network and Dial-up Connections, right-click Local Area Connection, and then click Properties.
    2. Click Install.
    3. In the Select Network Component Type dialog box, click Protocol, and then click Add.
    4. Under Network Protocol, click Internet Protocol (TCP/IP), and then click OK.
    5. When the protocol is installed, click Close.
  11. Reset the modem by turning the power off and then on, or for an internal modem, restart the computer.
  12. Test your Internet connectivity.

May 02, 2010 | Acer Aspire T650 PC Desktop

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