The 21-year-old central defender signed for the Clarets on a permanent basis after several months on loan and performed exceptionally in the 2-1 win over QPR in his first match after formally cutting ties with the Old Trafford side.
Keane, an England Under-21 international, admitted it was a wrench to leave the club he joined as a nine-year-old – but says the decision came down to playing time.
"We want to stay in this league and we believe we can do"
Michael Keane
He said: "It was a big decision. I spoke to my family about it for ages because I had been there for nearly 12 years now. But I felt it was the right time, especially as I am playing regularly and I wouldn't get that at United at the minute.
"They didn't force me out, but they said if everyone is fit there I wouldn't be starting games. I thought I am playing games here and at my age I have a chance to play regularly in the Premier League and that's all I ever wanted, so it was quite an easy decision in the end."
Keane added: "Now we want to stay in this league and we believe with the performances we have been putting in recently we can do.
"It was a huge game for us and we knew we had to win, especially at home against the teams that are around us."
Next up for Keane and his Burnley team-mates is an FA Cup Replay at Tottenham Hotspur on Wednesday after the sides battled to a 1-1 draw last week.
