When you connect your Samsung Infuse 4G to your PC, the phone asks which mode you want to connect the phone to your PC. There are three options given.
1. Samsung EZUpdater
2. Media Player
3. Mass Storage
But, when I attempted to connect by Samsung EZUpdater, my PCs could not install the driver. Samsung Canada does not offer any driver for Infuse 4G yet (August 10, 2011). But, Samsung USA offers:
After you install this driver, restart your windows. My Windows 7 didn’t recognized my Infuse 4G without restart. After restart, it did. But yours might recognize your Infuse 4G right away.