"try xbox.com" is a popular meme amongs The Flood usually posted when a person makes a thread relating to an xbox question. It starts off with one person saying something such as. "Try xbox.com" then next few suers start quoting each other saying the sites they have posted are phising sites or virus filled and post the same link. Most users think it was a Flood meme but the actual meme originated on xbox.com.
User A: My xbox has RROD wut do?
User B: Try xbox.com.
User C: [Quotes user B] No this website is a phising site don't go there! xbox.com is what you want.
User D: [Quotes user C] Stop fooling the poor kid! The real site is xbox.com.
User E: [Quotes user D] Ya'll wrong. It's obviously xbox.com.
You get the idea. here's a great example of the meme here.