telnetEnable.zip is for all windows os 9 or below
telnetenable2.zip is for windows 10 (UDF & newer netgear firmwares)
then send your broser to http://192.168.1.1/setup.cgi?todo=debug
then change the IP to your router, if you changed it
finally set your PC to a similar IP in the same subnet (e.g. 192.168.1.2)