Question : Problem: Will not connect to lan or internet

I have a wireless computer running Windows Media Center XP and having had any issues connecting to my lan or the internet until yesterday. I sucessfully connect to the access point with no issue, but as far trying to access my Lan or the internet its a no go. Nothing has been added or subtracted from the system, the workgroup is the same. And my other wireless computers in the home can access all my lan shares and the internet with no issue. I would appreciate any help with this problem

Answer : Problem: Will not connect to lan or internet

Tried all solutions given here, I ended up doing a total restore from the backup