Error 171: USB device not recognized htc desire A8183 while waiting for bootloader

[AC Question]

My phone is htc desire A8183.Its OS is android 2.2.I want to upgrade it to 2.3 gingerbread.I downloaded the RUU htc desire 2.3 ginger bread.while upgrading Error 171: USB device not recognized appeard in the computer.after some while RUU displays in the phone.can anyone help me to fix this error????