The Linksys WUSB54G wireless network card is an old piece of hardware. After upgrading to Windows 8, the device stopped working properly. Microsoft Update installed drivers that would work for a few seconds, but then would disconnect repeatedly. Fortunately, I found a workaround.
I located some community drivers for the WUSB54G. They were intended for Windows 7, but I modified them slightly.
Download Linksys WUSB54G Drivers for Windows 8 (Please don’t hotlink the file)
Note, I had to disable the Windows Driver Singing feature to get these to install. Use them at your own risk. I’m not responsible for any damage.
Also, for some reason, I had to rollback the drivers shortly after I installed these drivers. Windows decided to update them without my intervention. Since the rollback though, everything has worked solid.