I've installed Windows 7 on a notebook Sony vaio model VGN-TX5MN, every peripherics is well working, but not when I go installing external modem: ONDA DUCATI model MDC525UP, I see it on control panel as modem device, but there is a yellow triangle on "onda wireless adapter", and in Other devices "Onda CDMA Technologies MSM" I use Alice mobile software, that is installed properly. Many thanks for your help
Did you upgrade to Windows 7 or do a clean install? If you upgraded, then the software isn't installed properly, and will likely not work. If you did a clean install, you will need to find drivers compatible with Windows 7, and if there are none available you can try Windows Vista drivers.