[Windows] Need help, slow wireless connection with strong signal..

，描述： wireless connection problem

I have a problem with my wireless connection since yesterday, out of sudden. My wireless connection are going very slow, extremely slow with full signal. Even load a google homepage took me more than a minute. But when i plug in cable, the connection goes ok.I'm using linksys WRT54g wireless router, but I pretty sure that is not the problem of the router cause except me, other computer are working well with wireless.Thank for concerning.