A. A firewall is a program that monitors and blocks intruder programs from accessing your computer and keeps programs on your computer from contacting sites or other computers on the internet without your permission. You will be asked or queried if you want to allow cookies from different sites and you have the option to Block or Allow them. Norton Internet Security also blocks pop-up ads.
 

A. Before running ScanDisk, be sure to turn off any of the following that you have running: screen saver, virus scan, and any other programs that are running in the background so the scan will finish as quickly and efficiently as possible. To turn off the screen saver, right click in an open area of the desktop, click on Properties, click on the Screen Saver tab, click on the down arrow point and click on None and OK. To turn off the virus scan, right click on the virus scan icon in the system tray at the lower right of the screen and click on Disable virus scan. Press down Ctrl + Alt + Del (all together), select one at a time each running program except Systray and Explorer then click on End Task.