Avast's firewall are blocking my navigation with all my browsers...

Last night… Mysteriously, Avast’s firewall started blocking all my internet, 22 or 23 PM… I have 5 browser and all of them didn’t work… before 22 PM everything was fine… But it’s the second time that is happen… I’d reinstall my Windows… thought it will be solved… but, I understood that Avast is creating this angry problem…

  • Which Avast…? (IS/Premier)
  • Which version…?
  • OS…? (32/64 Bit…? - which SP…?)
  • Other security related software installed…?
  • Which AV(s) did you use before Avast…?