Sorry if it's been asked before, but a search for 64bit didn't turn up anything relevant.
I cannot install the Maple drivers on my Windows 7 64bit machine. When I try, I get this message:
Windows cannot verify the digital signature for the drivers required for this device. A recent hardware or software change might have installed a file that is signed incorrectly or damaged, or that might be malicious software from an unknown source. (Code 52)
I've had this problem with USBTinyISP before, and the solution was a convoluted series of steps which, when complete, forced you to press F8 every time your computer boots, then displays an ugly message at the bottom right of the screen which can only be gotten rid of with unnecessary hacks. As I'm told, getting drivers digitally signed is not an ordeal, as some claim. You just need to get in contact with Microsoft and show them your device, then explain how you're a small company with no revenue etc. and you won't be charged >100$ for the whole process.