I have 2 computers connected to a belkin router and i have cable internet. On one computer i cannot browse the internet after 10-15 minutes after booting up. I can still download files and play online games I am just unable to browse the internet using any browser. I have tried reinstallation of I.E., restored I.E. defaults, and have updated the firmware of my router. Is there anything I can do to fix it short of formatting?