From last two years I am having a Dell inspiron laptop, which is running with windows vista OS. I am a college student also doing work in a MNC company. I basically sue this machine for my home purpose, like to access internet for my study and few of official tasks. Io installed Mozilla Firefox web browser in my laptop. This worked fine, but from this morning, when I first open my machine and start web browser to access internet, I saw that, the background screen of the browser application is flickering continuously, and with within few second the flickering ratio is increases. I instantly reboot my machine, after that for first few minute there is nothing happened, but it starts again. Then I shut down my machine. Is this browser problem or any other machine problem, canít understand. Is there anyone having any suggestion on this issue?