Rune343, is this slow and noisy problem with your audio output a new problem, select YES/NO for all options; is this for all files, local as well as those downloaded and played in real time, has a new driver or update been loaded recently, are all connections to the audio equipment and loudspeakers clean and stable, without broken or frayed wires, is your PC doing some resource hungry processes, in the background, such as downloading or installing programs, or sorting all files on your disks, does this also occur when listening to local files, has your internet service changed, is the speed of your internet service fast enough or are you being throttled by your internet service provider? Is your setup set for fast service, or to conserve power; Have a look at https://www.uapb.edu/sites/www/Uploads/Assessment/webinar/session%203/13%20Problem%20Solving%20Models.pdf for various problem solving methods. Have a look at
Kepner tregoe approach to problem solving. You will need to provide more specific details for Microsoft to be able to zoom in to determine your specific problem, on your specific audio equipment and drivers, when updated, what equipment you use, spare processing capacity available, and most likely causes.