1. Use the Desire HD until the battery totally flat and auto off.
2. Turn it ON and Charge for 8 hours or more with wall charger.
3. Unplug the device and Turn the phone OFF and charge for 1 hour.
4. Unplug the device Turn ON wait 2 minutes and Turn OFF and charge for another hour.
5. Use the Desire HD until the battery totally flat and auto off.
6. Turn it ON and Charge until full (NO NEED to charge for 8 hours again).
Steps 2-4 is the original steps. My DHD battery life is still the same as before after step 4. Only after I did step 5 and 6 the battery become super long lasting. 

First, my laptop and DHD is connected the same WIFI network.

TURN OFF ANY FIREWALL, ON WINDOWS OR ANTI VIRUS.

on the router - Enable Universal Plug & Play

On the computer
Go to My computer > Network > Media Device > click on the device name
Media Player will launch
Go to Stream>tick " Allow remote control of my player. Please check the "More streaming Options. Make sure the "Media program on this PC and remote connection" is Allowed.

LET THIS WINDOW MEDIA PLAYER OPEN, DO NOT CLOSE IT.

On the DHD
Go to "Connected media" app, select music, photos or videos
eg.
select photos>you will see a button at the bottom called " Connected media". It will searching the media device.
go to album ( camera shots ), select any photo, then you should able to select the player.

Another Details Walkthru : Click Me!!

The following is a quick version of this guide, each setting is later explored in details.

    * Manually set your focus, wait for the focus signal to turn green, keep your hand steady until the shot is taken (keep it till the preview appears)
    * Make sure the camera protection glass is wiped clean
    * To fix image quality: Disable digital sharpness so it’s set to -2 or reduce it to -1 if you feel its too soft but never sharpness 0, or you can later increase sharpness using external apps.
    * To fix the video recording freezes: update to firmware 1.72 also make sure no apps are busy in the background (i.e. skype)
    * To fix low light bad video FPS: reduce the exposure setting to -2, it will go up to 30fps, use the flash to boost the brightness back.
    * To fix the green tint caused by the flash: set white balance to Fluorescent.
    * To fix the changing colors while recording video indoors: set the white balance manualy. Auto is good during daylight but jumpy indoors.
    * Higher ISO will always boost the camera available light, so higher ISO improves frame rate, reduces motion blur and reveals more detail in darkness.
      However keep in mind higher ISO will reduce image quality since it introduces noise to the image. Auto ISO is pretty smart.
    * If your photo is washed out, use the auto enhance effect from the gallery to fix levels and color balance, your photo will stay at 8MP
reference:xda-Desire HD Camera guide