To install a PCMCIA (PC Card) device on Windows Vista 64-bit, carry out the following...
If the device has been attached and is showing in device manager, right-click on the device and select "Update Driver".
If asked, select the option to not connect to the internet to find the software and select "Install from a list or specific location".
Browse to and select the <Windows>\inf\deskey folder (e.g. C:\Windows\inf\deskey). NOTE: The Windows\inf folder is hidden by default. You may need to contact for systems administrator for assistance.