我按照altera公司网站上提供的USB-Blaster Driver安装步骤安装USB-Blaster Driver 时, 在第5步点了next后就没有出现第6个步骤,而是出现了另一个界面,最后也一直都安装不上,请问下这是什么原因呢?

1. Plug the USB-Blaster into the PC. The Found New Hardware Wizard appears.
2. If you are prompted to answer a question about Windows XP Update, choose No, not this time and click Next.
3. Select Install from a list or specific location (Advanced) and click Next.
4. Select Don't search. I will choose the driver to install and click Next.
5. If you are prompted to Select a hardware type, keep the default selection Show All Devices, and click Next.
6. Select Altera USB-Blaster from the wizard list of hardware device, then click Have Disk .... If the device is not available in the list, click Have Disk ... without selecting any device from the wizard list.