Internet service provider: Sprint. Strong signal full bars. Sprint claims no problem on their end (tower, etc.) have tried 5 different wireless cards. HP laptop Pavilion. Windows 7. Rebooting, reconnecting, time of day, all have no effect. Sometimes works fine. Sometimes websites come up slow. A lot of the time web sites will not come up at all. Have Norton Virus. Tried turning norton off, no difference. Also have older HP laptop with windows xp. Happens on it too although not as bad. Going outside helps sometimes but not always.