Jason Roy and captain Joe Root both smashed centuries as the tourists easily reached their target of 361 with eight balls to spare in Barbados.
It was their highest ever run-chase in the format.
Chris Gayle's innings of 139 off 129 balls went in vain as the Windies' poor form in ODI cricket continued.
The second encounter of the five-match series will be played on Friday.
F1 confirms Abu Dhabi Grand Prix will close 2026 season
Formula One will end the 2026 season in Abu Dhabi's Yas Marina Circuit, reaffirming the championship’s commitment to the scheduled calendar.
Norris wins Dutch GP as Antonelli stretches his F1 lead
Lando Norris has given McLaren a third successive Dutch Grand Prix victory on Sunday in an intense race of shifting fortunes that had to be restarted after home hero Max Verstappen crashed on the opening lap.
Salah scores twice as Trabzonspor beat Basaksehir
Mohamed Salah has opened his account in the Turkish Super Lig with a double as Trabzonspor beat Istanbul Basaksehir 2-1 to clinch their first win of the season on Sunday.
Late Gvardiol strike earns Maresca winning start, Liverpool snatch last-gasp draw
Manchester City's post-Pep Guardiola era has begun with Josko Gvardiol's stoppage-time winner earning a 2-1 victory at home to Bournemouth in Enzo Maresca's first Premier League game in charge on Sunday.
Dutch GP re-starts after Verstappen crashes on opening lap
Max Verstappen has crashed out of his home Dutch Grand Prix at the end of the first lap on Sunday, halting the race and forcing a re-start.
