The Irishman shot 11 under for the tournament with a final round of five under in the damp weather in Northampton.
The Team Ireland/Greystones GC man held his nerve down the back nine, with pars on the final four holes securing the title after pi
cking up six birdies on the day.
"I came close last week and I got a taste for it, so it feels good to get the win," said Murray, who carded 205 for his three rounds of 68, 70 and 67.
"I didn't strike the ball well today to be honest and I wasn't really in control, but my short game was good and I never got into any real trouble."
He earned £10,000 and heads into next week's event at Faithlegg in Waterford in good spirit – and hoping to carry on a great start to the Tour for the Irish players.
Overnight leaders Michael Hempstock and Daniel Brooks had disappointing rounds, the former shooting two over for the day to finish seven under, the latter shooting an eight over 80 to finish one under.
Dale Marmion shot 69 to finish joint third with Haylock and Gaunt, with Lee Gauthier joining the winner Murray in shooting five under for the final round and finishing on seven under with Hempstock.
Murray collected the trophy from Collingtree's co-owner Eddie Jordan, the founder and former owner of the Jordan Formula One team.
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