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Vertical lines from the top to the bottom of the screen are due to failing T-CON board (part of the LCD panel assembly). You can try reseating the ribbon cable attached to the T-CON board, otherwise new screen will be needed, these failures are due to cheaply made screen by company such as Chi Mei. It willget worst with more lines. http://s807.photobucket.com/albums/yy352/budm/LCD%20panel/
Most LCD monitors have a default refresh rate of 60 Hz. Older monitors also have limited resolution. Please check your display settings and ensure you're not using a refresh rate higher than 60, or a resolution higher than what it supports. If either one is the case, you're lucky the LCD still works.
Vertical lines on a screen is not a processor problem, vertical lines is going to be a problem with the monitor or the video card. Try a different known working monitor on your computer and if the lines go away then you know that the original monitor is bad.
If the lines don't go away then try replacing the video card. If you have integrated video then the motherboard would need to be replaced. A processor driver download is not going to fix a vertical line problem.