My sims 3 mods are not working or even showing up as downloaded
I have been trying ever since I got my new laptop with windows 8.1, to get my sims 3 mods to work properly. I have tried multiple ways to try and get them to download properly, but nothing ever seems to make them show up on my downloads to be installed on my actual game when it's opened up. I'm not sure if there is a specific way or if I'm doing it wrong, but if you have the same problem or know how to solve this problem then please could you reply and help me out.