Hello Pl follow this.
1. Download driver for your device from net \ install from cd.
2. While installation is on , go to vistadisc ( where vista is installed and look for program files. Go to subfolder Huavei and copy MT882 folder to a safe location on the drive.
3. Open task manager by C+A+D.
4. Monitor installation prog from huavei GUI.
5. Will ask for connecting the device. It shall prompt for installing unsafe driver twice.
6. Continue with Install .
7. Finally will give you message for failed install. DO NOT WORRY.
8. Click on the task manager and kill Installation process. Your Huavei window will close.
9. Open control panel. click Network and Sharing center. Select Setup a connection or network. Choose connect to internet n follow process as you connected to net in Win Xp.
10. You will then be able to connect to net in WINDOWS Vista with usb connectivity.
11. All The best. Contact if you find problems.