England captain Eoin Morgan has vowed to keep the Windies under the pump by selecting his strongest team in the final two one-day internationals.
Morgan's side went 2-0 up in the Royal London Series in emphatic fashion with a 124-run victory in the third ODI at Bristol after Moeen Ali smashed a 53-ball hundred.
England now only need to win one of the remaining two matches to seal the series but Morgan is set to resist the temptation to give Jason Roy, Jake Ball or Tom Curran an opportunity.
"We're going to be as ruthless as we can be," Morgan told Sky Sports. "We're going to play our strongest XI for both games and hopefully go on to win the series convincingly."
Moeen's stunning innings put him behind only Jos Buttler in England's all-time list of fastest ODI centurions and the all-rounder ranked it as the best of his three tons in the 50-over format.
"It was my best ODI innings," said Moeen, who hit eight sixes and seven fours.
"Everything seemed to come off today and it was nice to get myself in. It was just good to play a few shots.
"I feel very confident in my own game but the main thing is that we're winning the series. Hopefully we win it 4-0."
Moeen's 102 took England to 369-9 after their innings had stuttered following the loss of Ben Stokes (73) and Joe Root (84) in quick succession.
Chris Gayle hammered 94 off 78 deliveries to give Windies an outside chance but Liam Plunkett finished with 5-52 as the tourists were bowled out for 245.
Morgan added: "Moeen's innings was the difference between the sides. Scoring upwards of 360 is going to be a tough chase.
"Delivering when the team needs him to deliver is obviously so important for us. Winning a game like this is very important as well in the context of the series. He's been outstanding today."
Jason Holder was disappointed his side allowed England to get away from them.
"The par score on this ground was probably 320," said the Windies captain. "We got off to a pretty decent start and kept up with the run-rate but kept losing wickets at crucial stages.
"Chris was exceptional but we needed bigger partnerships."