Greeting's

If you have a dell laptop there is a CD called the application's CD, when you start the laptop press F12 (default) and bring the boot menu. Choose your CD drive. Then you'll have a software that will load up Dell's hardware diagnostic software. Once the software is loaded you can choose memory to have the software test your RAM. You can also run a diagnostic test on any hardware component of your computer. This is just to eliminate Hardware failure.

Best of luck.