B_lino....
Are you using wi-fi or ethernet?
If Wi-fi - Are you in a neighbourhood with lots of routers?
Does your computer have a fast Wi-Fi card?
Where is the router in relation to the computer - my router was in the basement and the computer was on the second floor - too far away
Is you gateway/rpouter fast enough?
Personally - I had all of the above issues that were a factor in using Wi-Fi for streaming - so I went Ethernet and have not had any issues since.
Most of the issues were related to Wi-Fi speed and neighbourhood router interference - the service from my ISP is about the mid point in todays offerings, so it's definitely fast enough.
Regards...