The USBASP windows driver is based on libusb-win32. Back in May last year, we released version 1.2.4.0 of the driver. That version was a big improvement over the previous one as it was partly signed.

Since then, the libusb-win32 project has released version 1.2.5.0 of their driver. This driver is now fully signed, so installation is easier than before.

Download links are below