i believe something on your PC is preventing the ruu from running. possibly your antivirus is finding is as a threat?
if it closes right away,without letting checkmark even the first "i understand the risks" screen,then fault is nothing to do with drivers or the device.
if youve allready tried redownloading,then id prolly suspect something to do with the PC.
you can try disabling all firewalls and antivirus,as well as any other program that can communicate with the phone. i dont think you want htc sync fully installed,they tell you to install it to get the drivers,then uninstall it to run the utility.
i also thot that the phone had to have usb debugginf enabled

so im not 100% sure how accurate that link is.
if you can disable things and get the ruu to run,or possibly try on a different PC,then we can always extract rom.zip from the RUU and upload it for you.
you should hopefull be able to download that,verify the md5,and then flash it from your sd card in hboot
