WiFi File Transfer is trivial. So is
MyPhoneExplorer (using Bluetooth if you have it on your computer, or wifi).
Wifi File Transfer is just open a browser, go to the address the app gives you, choose the files you want to copy and download to where you want them. Hardly more than plugging the phone in to copy files.
As for reinstalling Windows 7, no. Uninstall the driver. (Right-click the phone in Device Manager [Control Panel], Properties, Driver tab, Uninstall button.)
Then download the driver (probably from
Motorola - Mac & Windows Drivers) and install it.
If it still doesn't work, bring the phone (and your cable) to a store and ask if it works on their computer. If it doesn't, they should do something for you (it's probably a bit out of warranty, and if you didn't take out coverage on it, they won't replace it, but if the microUSB connector is bad, it's not an expensive replacement [it's a drop-in part] and they should give you a break on the job). If it works on their computer, with your cable, you have a problem with your computer - that may need more than a reinstallation of Windows.
BTW, have you tried a different cable and/or a different USB port on the computer?