There are definite advantages to upgrading. XP is now nearly 10 years old, support is being phased out. That means even critical security patches will no longer be produced for it unless you are a corporation with a multi-million dollar extended support contract directly with MS. And security is an issue for XP. Microsoft has upgraded the security model thrice since XP was initially released (once at XP SP2, again with Vista, and lastly with 7's release). There's also better codec support and MUCH nicer home networking support in Win7.