sounds like you just brunt th image to disk and didnt mount the image using tools like deamon tools can made a copy, or use rufus to make a usb boot key (pen pen drive)
https://www.youtube.com/watch?v=psPWQy3-5B0
so when you plug your laptop into the port the PC uses you are also getting 100mb?
If not and you get 1000mb sounds like a duplex mismatch then set your PC to 1gb full duplex
Why two routers you can run two ssid's and more on one of the routers? How are the routers connected to the network, are both routers connected to the modem? or have you connected the routers in a daisy chain?
Looks like your router is causing the problem, how many devices are connected? I wouldn't worry about the one that is giving you no response its not allowing icmp packets
http://www.asus.com/us/Notebooks/F555LA/HelpDesk_Download/
OR
Use this http://www.iobit.com/en/beta/db3/downloadb.php#
It will update ALL your drivers to the latest it can find! probably the best option