The Android SDK has a function that allows one to interface devices with adb/fastboot via command line or terminal. Since you evidently don't have that, you can instead use our forum's Mini SDK which is a small package that gives you the same adb/fastboot tools without all the development stuff that comes with the full SDK:
ADB Guide (updated 2014/11/11)
You'll need adb interface drivers if you are running Windows. You might possibly have these on your machine so best to see if it works first, if not, give this driver a shot:
http://www.koushikdutta.com/post/universal-adb-driver
Plug your phone into the PC while it's showing fastboot mode. Assuming you unzipped the mini-sdk (download is actually called sdk-tools) to the root of your PC's "C" drive, then you would open the command prompt and navigate to that directory before issuing commands. So you'd type this in command prompt:
cd c:\sdk-tools
Once there, enter the command
fastboot devices. You should see the word fastboot show up as the output. If you get that, just to verify that it's 100% working, enter the command
fastboot reboot. If the phone reboots, you are ready to fastboot flash the partitions. Gonna stop there and make sure you get to that point before proceeding. Windows can bring about many difficulties in getting the above to work as it relates to drivers. If need be, we'll try another driver.
