Bamber Bridge secured their play-off place after an emphatic win at Church Lane.
New Mills had the better chances in the opening minutes, but the visitors took the lead in the 14th minute through Darren Green who netted off the underside of the bar.
The Millers saw Pollard go close soon after but Bamber Bridge made it 2-0 when Stuart Vasey’s tame header found the net.
New Mills pulled a goal back a minute before half-time when Windsor netted, but Vasey struck again after the re-start.
Paul Alexander rounded off proceedings for the visitors just past the hour mark as the Millers were condemned to yet another loss.
Roy Soule’s side round off a forgettable campaign on Saturday, when they travel to Darlington 1883.