The official Motorola USB drivers can be obtained for free from the following link:
Click here to install the Motorola USB Drivers (32 bit)
Click here to install the Motorola USB Drivers (64 bit)
Alternatively, you can download and install the USB Drivers from http://developer.motorola.com. These drivers are often newer than the ones above, but you will need to create a userid first. After logging in with the new userid, search for "usb driver", or navigate directly to http://developer.motorola.com/docstools/USB_Drivers/Handset_USB_Driver
After downloading and installing the Motorola Driver, you will need to run the Motorola Driver Installer program by going to "Windows->Start->Programs->Motorola Driver Installer->Motorola Driver Installer.exe".
This alternate Motorola USB Driver is required for most phone models from Verizon, Alltel, and US Cellular. Some of these models include:
Alltel V3a, Verizon K1m, Verizon Maxx Ve, Verizon L7c, Verizon W385, Verizon W755, Verizon Razr2 V9m, Verizon V750, Alltel Razr2 V9m, US Cellular Razr2 V9m, Sprint V3m, Sprint K1m
