Testing the USB setup before you do anything...
First download the latest USB drivers...
LGUnitedMobileDriver S4981MAN38AP22 ML WHQL Ver 3.8.1
from LG here
LG MS770 Support: Find Manuals & Warranty Info | LG USA
Find...
Download
Manuals & Documents
Software Update & Drivers << download the two files here and install...
OSP <<
Download the OSP LG (On-Screen Phone) and install...
Use the OSP to test your Wifi and USB connections...
If you get any errors during the install of the...
LGUnitedMobileDriver S4981MAN38AP22 ML WHQL Ver 3.8.1
...just rerun the install and make sure your phone is
NOT USB connected.
All the drivers should install without issue...
JFI I've tested this on Win7 64