I followed the instructions on how to add Froyo to my HTC Desire. I first downloaded the HTC sync. Then i downloaded the upgrade software which took 2hrs . While that was downloading I read the PDF file on what to do next and it advised me to make sure that I have the USB cable connected to both PC and Phone and to ensure that it was on Disk Mode. I got through the whole thing and it says that error 170 occured and to ensure that it was connected to phone or its my ports. I have rebooted my pc and pulled the battery on my phone just in case. I am able to transfer files from my computer to my phone and vice versa......so whats the problem...anybody have any recommendations.