Getting really

now. Sis has just text saying she is sick of unplugging and re-plugging, she has tried the "leave it on theory" but to no avail, she now wants me to dismantle it all (I have installed it so i can go on my laptop when i visit home). She needs it to do uni work and cant be bothered with the loss of connection every now and again, so now she wants me to just connect the router up when im actually home and not all the time.
And im not sure how to interrogate her NOD32 firewall/anti virus/Windows Firewall to see if its blocking the DHCP?
Help