Thanks guys. It is aol I am using. The problem is, a few months ago I had to get a new router as the old one had packed up. With the old router, the signal to the laptop was always excellent wherever I was in the house. However with the new one ( same make and model)signal strength is low to good. Hence the question about the MTU settings. With the old router I had to set it manualy as it was too high and I was having problems.