How do Dell help customer to be successful?And how do dell help them to solve problem?

Dell is committed to operating in a responsible and sustainable manner around the globe.
At the core of our business is a corporate philosophy that guides our conduct wherever we do business, which we call the Soul of Dell. Central to that philosophy is our commitment to global citizenship - understanding and respecting the laws, values and cultures wherever we do business; profitably growing in all markets; promoting a healthy business climate globally; and contributing positively in every community we call home, both personally and organizationally.
We have built processes around how we put into action the values and beliefs communicated by The Soul of Dell. Our accountability, environment and community programs help ensure that we operate in a manner consistent with our core values as we grow our business globally.

Dell markets themselves well.

They 'give' customer choice (customization)
They provide customer-friendly 'tool's and a 1-800#

simple. they don't.

Although I must say that Dell's tech support is still better than Apple's.

Ahh, very simple! Hire a room full of college graduates in India and give them each a hundred dollars a week. Nothing to it!

Dell used to have great technical support personal. Nowdays, they just let India handle the tech department and its a complete mess.