After googling I found some tech forums and they all answered the same way that updating the drivers resolved. Yes, very strange that it had been working but marges note lends support to the windows update having caused the issue.
Id constantly got 56 or 48mps coverage but since the windows update it would vary from 56 to 1 to 12 mbps etc, but then stayed around the lower band (1-2-4) mbps which isnt good. All while the other laptop beside it remained at 56. Since updating the drivers from intels support site, I monitored for an hour last night, and it stayed constantly at the upper end (56-48mbps).
Thanks for the added note Marge.