Yes, the 100 Mbps speed internet would be adequate to have several workloads at a time such as streaming, videoing, online games, and browsing the web pages on different devices. But in uploading of large files or streaming in 4K on more than one TV or numerous heavy users, greater speeds (200-500 Mbps) can lead to better performance.
Reboot Your PC - There is nothing more basic than rebooting but it can and does work!
Air pair/Unload headset/speakers
Install Audio Drivers-You can find you sound card drivers in Device Manager and update them.
Same Sample Rate Set same audio format in Sound Settings and audio interface.
Disable/Enable Audio Device Right-click your playback device> Disable >Enable.
Use a different Browser - This might arise due to browser problems.
When this problem is not solved, ensure there are updates in Windows or BIOS.