issue with HTC sync on XP 64
Of course, I've tried to install HTC sync 3.0 before, but installer failed to install the drivers. Chris Bunney reported (can't link, sorry) that installer fails on Windows XP x64 too. I think uninstalling device from system before installation starts could solve this issue but I didn't try it.
I hope you realise that if you download the latest HTC Sync it installs x64 drivers correctly and then you just have to start using adb for it to work. The guide linked in my signature also shows you how to set it up to run every time you start your computer so that you can run it from any command prompt without having to change location. This thread is more or less dead.
Of course, I've tried to install HTC sync 3.0 before, but installer failed to install the drivers. Chris Bunney reported (can't link, sorry) that installer fails on Windows XP x64 too. I think uninstalling device from system before installation starts could solve this issue but I didn't try it.