Nikon Coolscan & Nikon Scan 4.0: Driver for Windows Vista 64 bit, Windows 7 64 bit & Windows 8 64 bit
Even though Nikon does not officially support 64 bit Windows versions Nikon Scan 4.03 can still be used under such operating systems. We will detail how that can be accomplished below. Please note that you are using this information at your own risk and that we can't provide support for this. Of course that doesn't mean we'll not answer questions or are not interested in any problems you might encounter. This page is based on a Photo.net thread started by the community member Steel Chn whom we thank for this information. We mainly summarized that thread for our German users but to keep things in synch below is an English version also.
Building a driver for Nikon Scan 4.03 under Windows Vista 64 bit, Windows 7 64 bit & Windows 8 64 bit
To get started download Nikon Scan 4.03 for Windows Vista 32 bit. Install the software on your 64 bit Windows 7 or Windows 8. Next we need to create a driver for your scanner that is 64 bit compatible. To do so create a new folder anywhere on your system you feel comfortable with. Depending on the scanner model you own copy the two files "NKScnUSD.dll" and "Nks1394.inf" or respectively "NksUSB.inf" which are to be found under "C:\Program Files (x86)\Common Files\Nikon\Driver\Scan1394" or "C:\Program Files (x86)\Common Files\Nikon\Driver\ScanUSB" into that folder. Open "Nks1394.inf" or respectively "NksUSB.inf" in a text editor of your choice to replace its contents. To do so click into the text box below and press Ctrl+A followed by Ctrl+C to copy the code. Next enter your text editor and press Ctrl+A followed by Ctrl+V to paste the code into the *.inf file.
Save the file. Turn on your scanner and connect it to your computer. Go to Window's Control Panel and select System > Device Manager. On Windows 8 first follow the instructions at the end of this page which eventually take you to the Device Manager, too.
On Device Manager's device list your scanner is located in the imaging devices category. The corresponding entry will be named "Firewire Scanner" or something like that. Right click this entry and select "Update Driver Software". Next select "Browse My Computer" and specify the folder you created before. A warning message will be displayed which you will need to disregard, telling the system to go on with the installation. Afterwards your scanner should be listed under its correct name like "Nikon SUPER COOLSCAN 8000 ED". When you start Nikon Scan 4.03 after doing this it will detect your scanner and you should be good to go.
Installing and using unsigned drivers on Windows 8
We don't use our scanners on Windows 8 but user feedback tells us that in order to install the driver created above one needs to start Windows 8 in a special mode first. Getting Windows 8 to boot in that mode involves a series of steps of which we provide screen captures below. The screen captures come from a virtual Windows 8 machine and since FireWire devices can't be passed through to that virtual system we won't show the actual driver installation.
First get the Windows 8 menu to show and click the gear icon at its bottom. On the settings screen click the "Change PC settings" entry. There choose the General category from the "PC settings" list and scroll down all the way to the end of that category to reach the "Advanced startup" entry as shown. There press the "Restart now" button.
Your system will restart and after a while you'll get to this option screen. On it choose Troubleshoot, then choose "Advanced options" and finally choose "Startup Settings" where you'll find yet another Restart button. Press it to reboot to the "Startup Settings" screen and on it press either 7 or F7 on your keyboard to boot Windows 8 with its driver signature enforcement disabled.
After booting Windows 8 that way choose Search from the Windows 8 menu, enter "devmgmt.msc" and click on the App found to get to the Device Manager. Now install your driver as detailed above for Windows 7.
This will let you use Nikon Scan 4.03 on the 64 bit versions of Windows 8, Windows 7 and Windows Vista with the following Scanners: Nikon Super Coolscan LS-4000 ED, Nikon Super Coolscan LS-5000 ED, Nikon Super Coolscan LS-8000 ED, Nikon Super Coolscan LS-9000 ED, Nikon Coolscan IV (LS-40) and Nikon Coolscan V (LS-50).