http://luke.dashjr.org/programs/bitcoin/files/bfgminer/5.4.2/bfgminer-5.4.2-win64.zip windows 64 bit
http://luke.dashjr.org/programs/bitcoin/files/bfgminer/5.4.2/bfgminer-5.4.2-win32.zip windows 32 bit
on your windows PC after you download bfg and unzipped it, go to the start menu type in search box CMD
then CD to were you have bfg unzipped some thing like this C:\Users\Administrator\Desktop\bfgminer-5.4.2-win64
then type after you turn on the miner
bfgminer -o stratum+tcp://pool:port -u user -p pass --scrypt -S zus:all --set zus:chips=X --set zus:clock=Y --set zus:ignore_golden_nonce=1
the above lines should work with out the need to set a com port in the setting with BFG even with windows, you all so need to fill in the your mining pool and the user log in and pw. i left that as you see it .
if it says no device found you may need to install this driver
http://www.silabs.com/Support%20Documents/Software/CP210x_Windows_Drivers.zip
I left the chips as x and clock as y because there is two version of the gawminer black widow, i have no idea which one you have .
This might help some , i would use BFG miner over cgminer, bfg is kept up to date including old drivers as needed . cg miner had all scrypt mining support removed after version 3.80 or something like that bfg kept it all .
http://cryptominingasic.com/gaw-miners-black-widow-setup-instructions-and-user-manual/
http://cryptominingasic.com/bfgminer-port-for-zeusminer/
you many not need this line
--set zus:ignore_golden_nonce=1
if the miner under powers,the above line might be why , bfg was refined to work good with any Zeus miner type sense all the gawminer is, is a Zeus miner .
but do consider using any pi type and find out how to install Ubuntu 16 in it then use it, it works better then, all ways having a windows PC on etc but takes some learning.
keep the five bucks if this works , always glad to help .!!!