Block erupter issue

[alnoor1231]

 So I`m trying to run 30 block erupters through 6 D-link hubs that are connected by a base hub to an old shitty computer. It`s running windows xp (32bit). The problem i keep getting is that only about half of the usb`s work and the others keep getting the "u need to install winUSB driver" error. I am using the ZADIG utility and have the dang driver installed on the computer. I`ve tried plugging each usb in and out and have tried the "replace" driver function on ZADIG. What am I doing wrong 

[alnoor1231]

Also, running CGminer 3.3.2

[vm1990]

its something to do with windows xp a few people have had problems with it as it dosnt like multiples of the sames device. tje nest solutions tend to be upgrade to windows 7 or linux

[-ck]

Xp supports max of 8 of the same devices.

[alnoor1231]

Changed to Windows 7. Works like a dream. Thanks fellas!