'Any time I can win, I'm obviously playing well. It's been a fantastic week for me,' said Donald, whose win at the 2002 Southern Farm Bureau Classic was cut to 54 holes due to bad weather. 'This was a strong field in Barseback and a great course. To come here and win means so much to me. It means a lot personally to walk up the 18th on Sunday and win.'
Henrik Stenson birdied the 72nd hole to close a round of 3-under 69. He shared second place at 11-under-par 277 with Peter Hanson, who finished with a 1-under 71. Ian Poulter and Colin Montgomerie tied for fifth at minus-9.
Donald cruised out of the gate with five straight pars at Barsebck Golf & Country Club. He picked up his first birdie at the par-4 sixth. The Englishman missed the green right at the par-3 eighth. He was unable to get up-and-down for par, but cruised to four straight pars around the turn with a two-stroke lead.
Donald turned it on down the stretch. Donald drained a birdie putt at the 13th to move to minus-14 and take a three-stroke lead. He came right back to birdie the next hole, as did Hanson to remain within three strokes of Donald.
'I holed a lovely putt on 13 and that gave me a cushion back to three shots and then 14, after not a very good drive, I hit the shot that turned the tide and gave me that extra cushion when I made birdie there,' Donald said. 'Up three shots with four holes to go, I felt pretty good.'
Donald parred his next three holes as Hanson dropped four back with a bogey at the 15th. Donald capped the tournament in style as he rolled in a 12-foot birdie try at the last to claim his first European Tour win.
'It's icing on the cake to finish with a birdie and have all my rounds in the 60s, what more could I ask,' said Donald. 'It's been an amazing week. Luckily, Peter played great, but just couldn't make the putts to close the gap and it gave me a little breathing room the whole way around. That made it a little bit easier for me.'
Hanson birdied the par-4 second to get to 11 under and it looked as though he would pressure Donald throughout. However, he missed several birdie chances as he parred his next eight holes. Hanson bogeyed the 11th, but came right back to birdie the 12th.
The Swede birdied No. 14 to get to 12 under. Hanson however bogeyed the 15th and parred his final three holes to end at 11 under.
Stenson made a late charge up the leaderboard. He bogeyed the second and collected 10 pars to go along with that bogey over his opening 11 holes. He dropped in back-to-back birdies from the 12th for the second straight round to move to 9 under.
The 28-year-old Stenson birdied the par-5 16th for the third consecutive round and birdied the last to tie Hanson for second place.
David Lynn shot a 1-under 71 to end at 8-under-par 280, while Simon Khan closed with a 70 to end one stroke further back at minus-7.
Peter Lawrie set a new course record of 8-under 64 on Sunday. With that, he moved into a tie for eighth place at 6-under-par 282. He was joined there by 2003 champion Adam Scott, two-time winner here Jesper Parnevik, David Howell, Niclas Fasth, Marcel Siem and Steve Webster.