IceWulf

Alright then,
 
Open the Device Manager and in the properties of the device you need drivers for open up the "Details" tab. Change the "Property" box to "Hardware Ids" and post the strings on here. This is what will tell us what hardware ID string Windows sees and help you find the maker/model/revision of it.
 
I've included a picture to reference below.
 
Right click on the strings, choose "select all" and right click on the selection again and choose "copy". You can now paste all the strings in your reply and we should be able to find who made that device pretty quickly.
 
 

USB\VID_0BDA = REALTEK
PID_8179 = RTL8188EU
 
Try the drivers from TP-LINK as they use the same chip for their TL-WN723N and let us know how it goes. http://www.tp-link.com/us/download/TL-WN723N.html#Driver
Use version V3.
 
Enjoy!
 

It really depends what type of stream the cameras have - if the footage is UDP transport (one way only) it may just work, but I would check on that first. It seems very simple to buy a managed switch (Cisco, Juniper, etc) and only accept the traffic you want from the cameras on the network. I'd probably get myself a cheap Catalyst Cisco 100MB switch and go from there on Ebay.

On a managed switch it is totally doable. You could lock the traffic to mac addresses AND flow (what TCP/UDP ports). Still hackable? yes. But it will keep out the casuals.

NFS works fine if  you can use that. There is an NFS client in Windows 7 if you want SPEED
 
http://answers.microsoft.com/en-us/windows/forum/windows_7-windows_programs/nfs-client-for-windows-7/42aae25d-d077-4ff9-abdf-7314a589c46d?auth=1

Feel free to use Nekodrive if you can't get the native Microsoft driver.
 
https://code.google.com/archive/p/nekodrive/
 
Sample install instructions:
"
Windows – Client
Download and install the Dokan library the current version isDokanInstall_0.6.0.exe Download and install the Microsoft .NET Framework 4 Download and install Neko Drive the current version is NekoDrive_0_9_0.7z After NekoDrive is installed, launch the application. Change the Target Connection ip address to your server IP (e.g. 192.168.2.1). (optional) Set version to V3 Click on connect and it should connect to your server To mount the drive in windows, set the Device location and select a Disk name. Make sure Devices is set to the correct item (e.g. /home/username/NFS-Shared) Click on mount and the drive should show up in Windows Explorer" Enjoy!

Feel free to use Nekodrive if you can't get the native Microsoft driver.
 
https://code.google.com/archive/p/nekodrive/
 
Sample install instructions:
"
Windows – Client
Download and install the Dokan library the current version isDokanInstall_0.6.0.exe Download and install the Microsoft .NET Framework 4 Download and install Neko Drive the current version is NekoDrive_0_9_0.7z After NekoDrive is installed, launch the application. Change the Target Connection ip address to your server IP (e.g. 192.168.2.1). (optional) Set version to V3 Click on connect and it should connect to your server To mount the drive in windows, set the Device location and select a Disk name. Make sure Devices is set to the correct item (e.g. /home/username/NFS-Shared) Click on mount and the drive should show up in Windows Explorer" Enjoy!