|Third women's Twenty20 international, Northampton:|
|England 103-7 (20 overs) beat West Indies 93 (19.2 overs) by 10 runs|
England beat West Indies by 10 runs in the third women's Twenty20 international to take an unassailable 3-0 lead with two games remaining.
The hosts defended a total of 103-7 at Northampton to extend their unbeaten T20 run to 20 matches.
Slow left-armer Holly Colvin claimed 3-13 and seamer Arran Brindle 3-16 as West Indies were bowled out for 93.
Sarah Taylor again top-scored for England with 27, while only two Windies batters reached double figures.
"Every game is massive for this team," said player of the match Brindle.
"We want to win every game, so just because we are three games up in the series doesn't mean we are going to take our foot off the gas."
England laboured to three figures at Wantage Road after captain Charlotte Edwards, who won the toss, and Laura Marsh shared an opening stand of 33.
Shanel Daley, Anisa Mohammed and Shemaine Campbelle took two wickets apiece for West Indies, but they never recovered from slipping to 6-2 in the fourth over of their reply.
Despite Deandra Dottin's 17-ball 24, England completed victory when Anya Shrubsole bowled Mohammed with four balls unused.
However, England were dealt a blow earlier in the day after Susie Rowe, a regular in the Twenty20 side, was ruled out of the World Twenty20 with a broken thumb.
The sides meet again in the on Saturday, before the final match of the series at nearby Arundel on Sunday.