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.
Arsenal miss chance to go six points clear with draw at Brentford
Arsenal has wasted the chance to restore their six-point lead at the top of the Premier League table as they were held to a 1-1 draw at Brentford on Thursday, with Noni Madueke's second-half header cancelled out by Keane Lewis-Potter.
India thump Namibia ahead of Pakistan clash
Defending champions India continued their march towards the Super Eight stage of the Twenty20 World Cup with a 93-run win over Namibia in a group A contest at Arun Jaitley Stadium on Thursday.
Italy crush Nepal in maiden T20 World Cup victory
Brothers Justin and Anthony Mosca guided Twenty20 World Cup debutants Italy to their first win in the tournament, as their unbeaten half-centuries secured a dominant 10-wicket victory over Nepal in a Group C clash on Thursday.
Dubai Duty Free Tennis Championships reveals major expansion plan
The 2026 Dubai Duty Free Tennis Championships will usher in the start of a new era for one of the Middle East’s most iconic sporting events with plans revealed for an extensive two-phase redevelopment that will transform the Dubai Duty Free Tennis Stadium and surrounding Aviation Club Tennis Complex.
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