PINK VERTICAL LINE APPEARS ON LCD

Clarifications

It could very well be your video card. If you do see the line during POST (power on self test) prior to Windows loading, it is more likely a hardware issue, and not video drivers.
However, if the issue only appears prevalent once Windows has loaded in, then you may be able to upgrade/ reinstall video drivers with some luck.
I have a feeling however that the line through the screen is most likely a precursor to a dead video card. Dependant upon your laptop, this can mean a new mother board as they are often built in, and cannot be replaced.

It could possibly be the ribbon cable that connects the lcd to the lower half of the laptop. Especially if it is intermittently happening. I've seen those cables flake-out dozens of times. It is an area that is constantly being flexed, so this is a common point of failure.

I say lucky because they are usually in the neighborhood of $20-30 to replace, as long as you don't mind doing the work yourself.

I seriously doubt it would be the lcd if the problem went away and came back. If the pink line is visible before the OS boots, you can eliminate the driver from being a possibility.

If that is the case contact the maker for a referral as Nvidia have an issue with their Video Chip Sets well at least some of them and doing things like this is a common occurrence.

Only solution is either wait till Nvidia announce what they are going to do about it in the way of repairs or pay the Maker to replace it and get a receipt so that you can claim once Nvidia announce their solution.

If you go to a third Party for repairs you will not be covered in the event of a recall.

Col