Why my computer pop up a purple snaps when I try to set the keys of light on the side of my computer?

When I discover videos the purple locking always appears by itself or even for an online game.

But it mostly appears on both videos.
It also appears when I try to adjust the brightness of my screen. Even when I press the other
buttons on the side of my computer, not in the computer, it still won't show items I want to see
and it appears the purple lock.
The image appears in the middle of the screen which is a purple lock. It appears when I press on the
buttons on the side of my computer, not in the computer, but it still not work when I press it
with my fingers. And when I discovered videos, it appears always upward or even in an online game.
All I know is that it is not a virus, because I checked my computer this morning.
And I think that the buttons on the side of my computer are blocked because he
does not display menus that I pressed.
My computer is a Windows Vista Home Premium Intel.
But what I do know, is that why and how are the buttons locked?
Why this always pop purple lock - up on the middle of my screen
When I press on what be only watching videos?
How can I get rid of this button?
So please out there, if you know the answers to these questions, please help me
because this key has been irritating me and my family for weeks.
I also didn't even understand anything to get rid of this purple lock.
 
Help, please. Thank you.
 
 

Hi Madison Yang,

·         Have you made changes on the computer before this problem?

·         You receive an error message?

I suggest you follow these methods.

Method 1: Perform a clean boot to see if there is a conflict of software like the clean boot helps eliminate software conflicts.

Note: After the boot minimum troubleshooting step, follow step 7 in the link to return the computer to a Normal startupmode.

Method 2: Update video card drivers.

http://Windows.Microsoft.com/en-us/Windows-Vista/update-a-driver-for-hardware-that-isn ' t-work correctly

For reference:

The problems of the game performance

http://Windows.Microsoft.com/en-us/Windows-Vista/fixing-game-performance-problems

Tags: Windows

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