simplestuff: Had mine installed 10 days ago Am using windows 8.1 dropps of connetyion after a couple of minutes have to restart speed is around 15.0 upload less than 1.0
Based on that sort of sync speed you've either got wiring issues or you're way beyond the VDSL2 coverage area. Assuming your wiring isn't the issue you really need to contact your ISP to move back to ADSL2+ to resolve your stability.