Windows XP

• 1). Click on the "Start" button and click "Run."
  
  
• 2). Type "CMD" without the quotes and press the "Enter" key. This will load the Windows command prompt.
  
  
• 3). Type the command listed below into your command prompt.
  C:\>netsh interface ip delete arpcache
  
  
• 4). Press "Enter" on your keyboard. When the command finishes, you will see a line that says "Ok." Close the command prompt once the command has been completed.
  
  Note: If you receive an error while issuing this command, a conflict exists that needs to be addressed (see Tips).
  
  

Windows Vista/7:

• 1). Click on the "Start" button then "All Programs."
  
  
• 2). Click on the "Accessories" folder.
  
  
• 3). Right-click on the "Command Prompt" link and select "Run as administrator" from the right-click menu.
  
  
• 4). Type the command listed below into your command prompt.
  
  C:\>netsh interface ip delete arpcache
  
  
• 5). Press "Enter" on your keyboard. When the command finishes you will see a line that says "Ok." Close the command prompt once the command has been completed.