Hi, I am Dave, I will help you with this.
This is a bug in the new version of iCloud, many people are reporting this, there is nothing wrong with your Media Feature Pack, it is installed by default you do not need to install it.
Open the old Controls Panel, then set View at the top to large icons
Open Programs and Features
On the left, click 'Turn Windows Features on or off'
Expand the Media Features section and ensure the old Windows Media Player (Legacy) is enabled, if it was not enabled, enable it and restart your PC
If that does not solve this, you will need to contact Apple support, because there is nothing wrong with your system.