How can I prevent my HTC Desire from overheating? Recently I bought an HTC Desire overall I'm very happy with it. There seems to be one major flaw, it overheats quite easily causing it to reboot. I've run into this several times while driving using the navigation whilst recharging. Does anyone have any suggestions to workaround this problem? I've searched around but haven't found any helpful information.
[I also have a HTC Desire]

Your device overheats because its hardware is strained a lot during heavy use such as turn-by-turn navigation. This is compounded by the fact you probably have plugged it in the car charger as well, which is also known to generate some amount of heat (you probably have noticed this yourself when charging your phone normally). 

There doesn't seem much that you can do to alleviate the problem, except turning off turn-by-turn navigation and only use the map to show you the route. You might also want to check whether there are other apps and services that strain unnecessary the device (frequent syncing could be an issue, as well as Bluetooth and mobile internet).