Ryan Giggs has promised to "put the smiles back on fans' faces" and that his Manchester United side will adopt a philosophy of passion and speed.

Giggs gave an assured performance at his opening press conference as the interim manager.

After giving a short speech in which he thanked the sacked David Moyes for giving him a start as a coach, Giggs said he wanted players to "enjoy and express themselves".

Moyes lost his job on Tuesday and Giggs, the club's most decorated player, was asked to step in by the club's chief executive, Ed Woodward. The 40-year-old is still to retire as a player but will assume managerial responsibilities against Norwich on Saturday.

And, when asked by MUTV on Friday if he had considered turning down the offer, he said: "When Ed asked me to look after the team for the remaining four games, I had no hesitation in saying yes. I've got to say this is the proudest moment of my life. The club has been the biggest part of my life since I was 14.

"I'm proud, happy, a little bit nervous, but just like I am as a player, I can't wait for the game on Saturday. I can't wait for 5.30 tomorrow when we walk out at Old Trafford. I know the place will be rocking. I've told the players: 'I trust you and I know what you're capable of. Go out there and show it.' "

Of United's dismal campaign under Moyes, Giggs said: "It's been a frustrating season. We win together and lose together and in these remaining four games, I want to bring the positivity back.

"We have three games at Old Trafford, where the home form hasn't been great, and I want to see goals, tackles, players taking players on and getting the crowd up. I want the passion that should come with being a Manchester United player."

Giggs even joked about himself as a player. "I've just given myself a five-year contract."

Moyes left United seventh in the Premier League, 23 points behind the leaders Liverpool. Moyes was dogged by rumours – always denied by the Scot – that he did not have a good relationship with his players. "I'd like to thank David for giving me my first chance in coaching," said Giggs, who was appointed first-team coach when Moyes arrived. "It was something I'll always remember when he rang me in the summer and asked me to come on board. Obviously I was still playing but he's given me my first opportunity of a coaching role."