Default [Q] ADB Fastboot Error Win 8

I HAVE A NET HTC one andi want to root but
i cant even unlock the bootloader
when i connect my device to my desktop windows 8 64bit pro
the device connects fine in normal mode it gives problem when in fastboot mode
the device in device manager shows as unrecognized device and device malfuntion type notification
it connects fine on windows 7 another pc is there a way to fix this
i have sync installed everything done but whenever i try to use cmd to unlock
it gives waiting for device please help
thanks