Hello, I've bought my first ever wireless router so I'm completely unfamiliar with how I can use the Linksys software to make my router as secure as possible. I'm using old OS, Windows XP SP3. The router I got is E4200 Linksys wireless router. I'd appreciate any advice on any settings I can change from default in order to more secure it? I actually don't, at the moment, have any wireless devices at all. I simply have the router connected to my SB6120 cable modem. Also, I'm confused as to which Security Mode to set. It wpa2/wpa mixed mode preferred?