Windows App Issues

Hi,

I've been having issues with my Windows Apps.

My Google Chrome is working fine but I cannot open my youtube app, pandora app or pinterest app on my laptop.

Every time I go to open it, it just says that I need the flash player, and I've probably downloaded it 20 times already but nothing works.

I can go onto my google chrome and it will open and play fine but I want to use the app I have.

I am running Windows 8 on a Lenovo Yoga 2 Pro, 64-bit.

I haven't found anyone else with this issue so I'm not sure what is going on, it's only my apps that have an issues, but not any of my browsers.

Thanks.