Works laptop updated recently to the latest W10 version- developers something or other? After that its wifi wouldn't connect to the signal at home which I at first assumed was down to loads of other networks in the area all using the same wifi band- changing the Sky modem/router to a clearer channel seemed better but then it seemed that if the laptop went into standby or into hibernation it wasn't connecting to the wifi without rebooting the laptop.
Found out later via WTen forum that someone else had the problem and spotted their laptop had turned off wifi to save power because of said recent update. remedy is to go to System, device manager, find "network adaptors" in the list and click it, look for your wireless adaptor, right click it, select properties and then power management tab where you should find the box ticked for "allow computer to turn off wifi to save power", untick this and exit back out.
Sorted the problem here!