Changing priority in Router

[SirDarknight]

I've a Asus RT-N10E router, the LAN cable is connected to a Desktop(one my sister uses) and I use WiFi in my Laptop. The problem is, my sister's desktop is the top device in the router's priority list or something similar. So, whenever she downloads something, I get slow speed. Is there any way to change it?

 

[GokAy]

I guess QoS is what you need. Quality of Service explained: Routers with QoS improve home networks to get you started.

If QoS fails, you can also try installing a download limiter on sister's PC. But no idea if it would limit all kinds of downloads.