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How to Fix Invalid IP Address Errors on Your Computer

September 25th, 2011 Leave a comment Go to comments

 

What Is an Invalid IP Address Error?

If you’ve removed Norton Antivirus from your computer, or you’re attempting to connect to the Internet upon purchasing a new modem or Internet service, you may get an Invalid IP Address Error if the client doesn’t boot up correctly.

 

What Causes a Windows Invalid IP Address Error?

An Invalid IP Address Error can occur if a computer with a Windows operating system doesn’t get an IP address from the Dynamic Host Configuration Protocol (DHCP) from the service provider. It may also occur if the Dynamic Host Configuration Protocol doesn’t initialize as it should when Norton Antivirus software is removed from the computer leaving a SYMTDI dependency.

 

How to Fix Windows Invalid IP Address Errors

Below are two solutions to help you fix an Invalid IP Address error that may occur on your computer. Use Solution 1 with a Windows Vista operating system if the issue is with a modem. Use Solution 2 if you’ve removed Norton Antivirus software from your computer.

 

Solution 1: Disable DHCP Broadcast flag

Steps:

  1. Back up your system registry. (Because you will be making changes to your computer’s registry with the steps below, it’s critical you follow these steps exactly. The backup suggested here provides added protection in case something goes wrong. For information on backing up your system registry, go to: http://support.microsoft.com/kb/322756/).
  2. Go to Start.
  3. In the Start Search box type in regedit.
  4. Select reedit from the Programs listing.
  5. Type your password if prompted for it and Continue.
  6. Locate the following subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\ {GUID}
  7. Click on the registry subkey in Step 5.
  8. Click the GUID subkey in the above registry path that goes with the network adapter connected to the network.
  9. Go to the Edit menu.
  10. Go to New.
  11. Click DWORD (32-bit) Value.
  12. Type DhcpConnEnableBcastFlagToggle in New Value #1 box.
  13. Click on OK.
  14. Close out of the Registry Editor.
  15. Try reinstalling and rebooting the modem with the computer.

 

Solution 2: Remove SYMTDI

Steps:

  1. Back up your system registry. (Because you will be making changes to your computer’s registry with the steps below, it’s critical you follow these steps exactly. The backup suggested here provides added protection in case something goes wrong. For information on backing up your system registry, go to: http://support.microsoft.com/kb/322756/).
  2. Go to Start.
  3. Select Run.
  4. In the box type in regedit.
  5. Click on OK.
  6. Look for the Registry key showing: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\DHCP DependOnService
  7. Remove SYMTDI from the dependency list to edit the value.
  8. Restart your computer.

 

One of these solutions should resolve an Invalid IP Address Error on your computer. Let me know if you have additional questions. Good luck!

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