I was trying to get fastboot working with my low cost Dell Venue 7 but the fastboot doesn’t return anything.
After some search I found this fastboot binary:
http://www.mediafire.com/download/pbr4b2x2ig9b2m5/fastboot
I found a reference to it here:
https://software.intel.com/en-us/forums/android-applications-on-intel-architecture/topic/494961
Magically it worked fine!