Hi , i am unable to watch a video on you tube, etc for any more than a few seconds at a time. This did not use to be a problem until recently . I have desktop connected to bt home hub 3 through cable and laptop by wireless but both give very slow speeds . according to bt i should receive 2.5 Mb/s in this area although speed test shows 0.24 Mb/s . What possibles could be slowing things down