I installed Windows 7 on two computers which use a Linksys WUSB54G v4 network adapter.
During the install they had internet by LAN cable, which allowed the drivers to be downloaded through Windows Update, and everything seemed great.
Then I started getting the blue screen of death, reporting wusb54g.sys as the cause, the weird thing is certain songs on Spotify would trigger a BSOD every time.
The solution was using a driver from http://www.ralinktech.com who made the chip inside the WUSB54G.
Download 'USB (RT2500USB)' and run the .exe, In Device Manager right click the device, Update driver, Browse, Pick, Network adaptors, one of the two Ralink Technology entries has 'RT2500 USB'.