Well didn't take too long, I am loving the laptop but have a USB port that seems to be acting up. It will randomly disconnect and reconnect. Not sure which port it is, but it says this on the description: Port_#0002.Hub_#0003
Search for driver updates.... USB 3 has been known to act flakey at times, I have experienced this myself. I have had no problems with USB 2 ports though, and after installing updates for USB 3, it seems to have stabilized.
ASUS Republic of Gamers G74SX-DH73-3D 😄 Intel 510 Series 250 GB SATA Version 3 2.5-Inch Solid-State Drive Dual Boot Windows 7 Ultimate/Fedora 16 ASUS Zenbook UX31E-DH53 13.3-Inch Ultrabook
On my G74SX-A1, in Device Manager, the "USB Composite Device" under "Universal Serial Bus controllers" has a "Location information" property of value "Port_#0002.Hub_#0003" in the "Details" tab of Properties for the USB Composite Device. The "Bus reported device description" property has a value "ASUS USB2.0 Webcam". This makes sense, since the Webcam/Microphone is a composite (serving more than one purpose) device.
So I believe it is your Webcam that is randomly disconnecting. For a first step in troubleshooting, I would uninstall the ASUS USB2.0 Webcam in Device Manager, then reboot the system. It should detect the Webcam on startup and install the Windows 7 Plug N Play driver (which is currently running on my Webcam).
If that fails to resolve the issue, I would boot into Safe Mode and install the latest Intel Chipset driver from the command line using the -overall switch. This driver may be downloaded from a link in the OP of http://rog.asus.com/forum/showthread.php?5224-Drivers-Apps-and-How-to-s. Instructions for installing using the -overall switch are at the bottom of this post.
If you choose "Action - Scan for hardware changes" in the top menu of Device Manager, does "ASUS USB2.0 WebCam" appear under "Imaging Devices"? If not, I think it is likely you are experiencing a hardware problem. I remember a post from late lasy year where the user could get the camera to connect by wiggling the laptop lid - definitely a hardware problem in that case.