Alright, I've had my laptop for about a year and its worked fine up until recently. A few weeks ago, the internet on it stopped working, but it works on our desktop, which uses XP. I can connect to other networks fine, it's only my home network. Whenever I tried to connect, it would load for a long time and then say 'Windows was unable to connect to [Network name]". I went to my grandparent's house for the weekend and i could use their internet fine, but now i'm back at my dad's house and it gives me an option to enter the network security key, but whenever i do it says 'possible network security key mismatch' and won't let me in. I actually got past the 'possible network security key mismatch' thing once and it just said 'windows was unable to connect to [network name]". Please help!!