Hi. I am new to this, my problem is that I was downloading some stuff from a site, and now my Avent laptop on vista won,t start up it just stays on the black screen, the lights are on i.e the power light. I have tried removing the power lead and the battery, reconnecting both power lead and battery but still no joy. It won't pass the boot up detail, and then to the login screen it just stays blank. I am wondering if my laptop has been infected by a virus fro the site which has locked the screen at start up or could it be mechanical. can anyone help Please.