Why is hotspot not working on my laptop?

I'm trying to use hotspot on my laptop from my iPhone 4S. I haves turned my iphone off then turned it back on then plugged my phone into the laptop then that worked then it quit working.
Now I'm restarting my laptop.

That's strange that it doesn't work properly even with the USB cable.

When you say it quit working, do you mean that no websites load on your computer? What type of Laptop do you have? Mac or Windows?

For a list of troubleshooting steps based on what you described, I'd suggest following this guide: http://support.apple.com/.../kb/TS2756

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