@burnout426 My Savior !
Damned I didn't manage to download that package I've been hearing from everywhere.
Downloaded it from https://www.microsoft.com/en-us/software-download/mediafeaturepack
Note for other users : I haven't been able to use the package from May (your computer doesn't support it or something like that) but the one from october 2018 did the job
Thank you so much man !