OR it just could be that this laptop does not have enough resources, processor power to run it all at once?
There is a conflict between the audio driver and the data card interface?
Backup all your files to DVD, thumb drive, etc...
Uninstall the audio driver, restart the computer, go to the manufacturer website, download the latest (win 7) audio drivers for that specific model, save to the desktop.
Plug in the data card, turn off the antivirus and firewall, load the new audio drivers, restart the computer.
After the computer fully boots and finishes booting, turn the antivirus and firewall back on...
NOW does it work OK? if not try the manufacturer tech support?