Giggs was appointed interim player-manager on Tuesday following the sacking of David Moyes.
The Welshman was in a good mood as he conducted his first press conference, even joking that he had given himself a new five-year contract.
The midfielder said the season under Moyes had been "frustrating" and he wants to restore some pride in his four games in charge.
"It's a proud moment for me to manage Manchester United and it's one I will enjoy," said Giggs, who will take his place in the dugout for the first time against Norwich on Saturday.
"I want to bring back some smiles on the faces of the fans.
"I can't wait for the game, the players are excited too.
"I know the stadium will be bouncing."
Moyes left United seventh in the Barclays Premier League, some 23 points behind leaders Liverpool.
Moyes was dogged by rumours - always denied by the Scot - that he did not have a good relationship with his players.
Giggs took time to thank his manager at the start of his press conference.
"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."
But despite Giggs' warm words about Moyes, there was a feeling around Carrington this morning that everyone at the club was keen to move on and forget the 10 torturous months under the former Everton boss.
United were flat, unimaginative and slow in Moyes' final game in charge - a 2-0 loss at Goodison Park.
Giggs, the club's most decorated player, wants to bring a bit of flair back to Old Trafford.
"It's been a frustrating season for everyone," said 40-year-old, who has won 13 Premier League titles with the club.
"We win together and lose together and in these remaining four games, I want to bring the positivity back.
"We have three home 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 came through the youth ranks at Old Trafford and was part of the famed 'Class of '92' that helped contribute to so much of the club's success under Sir Alex Ferguson.
The club's record appearance maker could not hide his delight at being appointed interim manager.
"I am proud to be managing Manchester United for the remaining games," said Giggs, who has played 962 times for the club.
"It's a club I've been associated with for 25 years and it's a proud moment for me and one I will enjoy.
"I've enjoyed the week and I'm proud more than anything. It's probably the proudest moment of my career.
"It has been a difficult week for the club and it was a shock to me on Tuesday when I spoke to Ed and he informed me David was leaving and then asked me to take over.
"It's been a bit of a whirlwind week for me but one I've enjoyed - it has been different, chaotic and I've been getting a little taste as it's my fourth day in the job.
"I can never imagine what you have to do and things it entails being a Manchester United manager."
Giggs, who started taking his UEFA pro-license at the beginning of the season, is not being considered by the United board as a replacement for Moyes.
A lot of United fans would like to see Giggs in charge next year, but he refused to reveal his plans beyond the end of the season.
"I'm just concentrating on a short term," Giggs said.
"I am concentrating on the four games remaining.
"After that, I've not really thought about it."