green border player

I have new issue with this annoying green border around the media player, I want to remove it .
how to remove or disable it ?

Im waiting...

Did you recently update your graphics driver or change any of its settings?
Which player are you using?
Can you add a screenshot of the player, so I can see the exact problem?

I Only have this green border in x64 version, it may not be that much annoying but it pissing me off when I watch something in fullscreen .
now Im using 32 verison without any border color .
I dont think this issue related to my graphic driver, I didnt update it over three months .
I have win7 64 version and this is my first time using 64version of media player classic.

That screenshot was very useful. That green border is added by a security tool on your computer. It indicates that the program is running in a sandbox (a protected environment).

Admin wrote:That screenshot was very useful. That green border is added by a security tool on your computer. It indicates that the program is running in a sandbox (a protected environment).

you were right about it, how the hell did you know it was the sandbox

thanks Admin