Should you install the KB5004476 update on Windows 10?
Obviously, if you weren’t affected by Microsoft Store failures when downloading certain games, there’s no need to install out of the band.
There is a reason why it’s labelled “optional” and it’s possible that you can run into other issues if you apply the update that you don’t really need.
When the problem first emerged, folks were able to address Store failures by resetting the Xbox app and clearing the Windows Store cache, but that’s obviously far from ideal (as it could break other functionality on the OS). To help those users, Microsoft launched an investigation last month, and a fix has been provided swiftly today.