Thanks for posting. Apologies that your system is not performing as expected.
Have you run a systems diagnostics on your computer yet? You can do this by pressing F12 at startup or using Support Assist http://bit.ly/1UXBb2H. Run the diagnostics, make a note of any error messages, then post back.
You can also contact Tech Support for further troubleshooting at 1-800-624-9896 or 1-800-288-4410, or you can initiate a chat session http://dell.to/2v4snVm