How do I reinstall to factory settings.

1.Turn the power off.

If your HTC Desire is frozen, pull the battery out and reinsert it

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2.Hold theVolume Down button

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3.Press and release the Power button

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4.You are now presented with a menu that allows forFastbook, Recovery, Clear Storage, and Simlock

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5.Select Clear Storage by pressing the Volume Down button

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6.Press and release the Power button

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7.Now simply confirm your decision: Volume Up for YES and Volume Down for NO If you selected YES, all data including third-party applications will be deleted from the HTC Desire. Once the wipe is complete,the phone will reboot to its factory fresh state.

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Note: your data stored on the microSD card is not deleted.