Windows XP

• 1). Press “Ctrl + Alt + Del” to bring up your task manager.
  
  
• 2). Click on the “Performance” tab.
  
  
• 3). Look at the graph under “PF Usage.” This is the total amount of virtual memory currently in use.
  
  

Windows Vista

• 1). Press “Ctrl + Alt + Del” to bring up the task manager.
  
  
• 2). Click the “Start Task Manger” link if prompted.
  
  
• 3). Click on the “Performance” tab.
  
  
• 4). Look at the bottom below “System.” Next to “Page File” are two sets of numbers. The number on the left is the current amount of virtual memory in use.
  
  

Windows 7

• 1). Click on “Start,” then in “Search.”
  
  
• 2). Type, “perform” and press “Enter.”
  
  
• 3). Click the "Add" button on the toolbar.
  
  
• 4). Scroll to and click on “Paging File.”
  
  
• 5). Click the “Add” button on the bottom.
  
  
• 6). Click the “OK” button. This brings you to the performance graph. The red line represents the current percentage of virtual memory in use.