Nice! USBTinyISP drivers for 64-bit Windows 7 / Vista x64, Jeff writes –
For some reason, the 32-bit versions of these operating systems don’t prevent the unsigned drivers from being installed, although they do complain.
There are a few workarounds that involve hacking Windows or disabling digital signature checking, but thanks to a tip by user wayneft on the Adafruit support forums, I was able to make the process much more straightforward. The USBTiny drivers are based on libusb-win32. Based on some notes I found on the libusb-win32 wiki, I discovered that the latest libusb drivers contain a proper digital signature…
I used the Windows device manager to upgrade the broken drivers on my Windows 7 64-bit machine. There is still a warning that “Windows can’t verify the publisher of this driver software” but there are no more errors about digital signatures and the new drivers appear to install and work correctly.
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