I have just bought an HP Pavilion computer with Windows Vista Home Premium. It all runs fine and I have downloaded normal software such as Real Player, AVG virus and spyware programs, Firefox, etc. Nothing fancy. I have a very unusual problem when surfing the net with either IE or Firefox. The browsers will not access Microsoft web sites such as the Vista home page and various help sites. All other sites I have tried are accessible. I returned the computer to the store and they checked things out with their internet connection and all was fine. I have referred the problem to my ISP who thinks it may be a network issue and are investigating, but no response or solution as yet. In addition to this issue, I also have another one peculiar to IE. When using this browser I find that most of the time it freezes and will not close without going to the task menu and stopping the program from running.