Firefox works and is default browser. but,internet explorer starts trying to come on,i know this because my clock stops,all processes slow,i start to shut things down,this warning appears:InternetExplorer is not responding. I stop Internet. Expl. and clock resets to normal and I continue on, until it does it again, and again. I am not sure which version of Firefox I have, but I do keep it updated. When this starts to happen, I hit ctrl, alt, delete thinking maybe something is processing that is slowing me down, and it does not show anything that I am not working on., however I try to put my cursor on the bottom row , like the clock icon or start button and it does the "twirlly" thing showing something is processing. I just keep messing with it till It shows me the warning... I mentioned above about internet explorer not responding. hope this helps.