Internet problem PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

My internet has been acting funny lately! It gets kind of slow sometimes and really fast other times! Sometimes I cant open pages and it will ask me if I want to diagnose the connection problem, I click yes and microsoft tells me it cant find a problem! I know its not a virus because this is a brand new computer running internet security software that I bought. here is a log of the problem, could someone please just explain all this to me?

 

Network diagnostics framework

 

unable to diagnose/repair network problems

 

Problem signature

Problem Event Name: NetworkDiagnosticsFrameworkV2

Vendor: Microsoft

OwnerHC: WinInetHelperClass

OwnerHCVersion: 1.0

SessionStatus: 3

HRESULT: 0

Repair: {00000000-0000-0000-0000-000000000000}

RootCauseHC: WinInetHelperClass

RootCauseHCVersion: 1.0

RootCause: {00000000-0000-0000-0000-000000000000}

OS Version: 6.0.6001.2.1.0.768.3

Locale ID: 1033

Files that help describe the problem

eventlog.etl

 

 

 

 

 

ps- Im on vista premium sp1