Enabling Multiple Processors or Cores with Windows Vista or 7

• 1). Click "Start." Type "msconfig" in the Search box. This will open the System Configuration window.
  
  
• 2). Click the "Boot" tab. Click "Advanced Options." The Boot options menu should appear.
  
  
• 3). Click the check box next to "Number of Processor."
  
  
• 4). Use the drop-down box to highlight the number of processors or cores you want to enable.
  
  
• 5). Click "OK." Restart the computer.
  
  

Enabling Multiple Processors or Cores with Windows XP

• 1). Click on "Start." Click "Run." Type "msconfig" in the text box. This will start the System Configuration Utility.
  
  
• 2). Click the "BOOT.INI" tab. Click "Advanced."
  
  
• 3). Click the check box next to "/NUMPROC."
  
  
• 4). Click the arrow next to the drop-down box to select the number of processors to enable.
  
  
• 5). Click "OK." Restart the computer.