I think I'm not communicating well. I noticed the problem while watching the DVD. The Problem persists sans DVD. The top 2 inches of my screen (toolbar and extending down into the post immediately above this dialog box) are shadowed by these semetrical "blocks" of vertical lines. On Mudcat, the 'bars' do not show up behind the cursor arrow, but do show up on the IE toolbar and extend down into the screen area of the adjacent post. The bars behind the cursor DO show up on the desktop, on CNN, and on weather.gov, for example. Pretend the following are vertical (instead of slanted) lines, and that they are much closer together - like a bar code.

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Amos, Have restarted the computer numerous times. However, monitor on-and-off switch is kaput, and monitor itself can not be turned off. Should I try unplugging the monitor and then plugging it back in?