bad RAM

Well, I am a Blender user, but this is not why I am here today.

My notebook has two memory modules, and two days ago I got a blue screen with error messages and my notebook restarted, and it keeps doing that over and over, until I removed one of the memory modules (RAMs). Does anyone know how to fix this problem, so I that I can use this RAM again?
Thanks.

The only realistic way(unless the RAM’s under warrenty), is to buy a new stick.