My laptop, which I'm using to write this now, had become very sluggish, and no matter how many times I defragged it, no matter how many files I deleted, and no matter how many background programs I shut down, it still ran way too slow for my tastes. I purchased two of these to upgrade my RAM to the maximum capacity, and now I'm back in business. In spite of being technologically challenged, I installed these myself in about four minutes tonight, and my computer is running faster and working better than it ever has. I'm a happy camper.