If you are noticing slow performance in Windows Vista, one of many contributing factors may be the health of your RAM. Windows Vista comes with a RAM testing application and in this guide you’ll learn how to access and use it. Many users have reported increased performance after using this test; thank you for your feedback!
Use the Windows Vista Memory Testing Tool
Press Start, type memory in the search bar, and press Enter
Select Restart Now and Check for Problems
Your computer will restart and run a memory diagnostic. This test may take up to 30 minutes.