Right-click the .exe file and select "Run as administrator".
Solution: Open Device Manager in Windows, locate the trackpad, right-click, and select "Update Driver." Manually point to the driver folder extracted by Bootcamp 3.0 64-bit.exe . Bootcamp 3.0 64-bit.exe Download
: Executable files ( .exe ) from unverified sources are common vectors for computer viruses. Right-click the