Folks,My issue : Some websites are not opening. For example, grockit.com , beatthegmat.com is not opening. Other websites are opening.My Device:Network : BSNL ( Dialup) 2g plan.( Micromax USB modem)OS : VistaSteps taken :1. Completely browsed all previous threads of this forum dealing with this issue.Resolution :1. Flush method is not working2. Open DNS is not working3. Change of MTU( maximum transmission units) may be applicable.( iam still working on it using Kitz.co.uk methodology)Now , plz let me know how to change MTU settings?What Number i should give.Plz share ur thoughts.Should I go for system restore? What if same problem peeps in after 10 more days again?