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“I’m a PC,” and I know how to partaaaay!

Here are the photos that show Microsoft computer-geek mogul Bill Gates partying like a rock star at the Sundance Film Festival, as he shook his booty with a bevy of beauties and flirted up a storm all over town.

Gates, whose new search engine, Bing.com, sponsored several events at the cinema summit in Utah, got down at a John Legend concert as if he were Lindsay Lohan atop the banquette — playing air guitar and slapping a double high-five with a blond cutie among a group of adoring gals.

“It was like the ‘Elaine dance’ from ‘Seinfeld’ — jerky moves, some kicking, arms flailing,” our spy said.

“Many of the people dancing with him were laughing and reveling in the fact that a 50-plus-year-old egghead’s egghead was rocking out to John Legend and ’80s tunes. Two of his favorite songs were ‘Like a Prayer’ and ‘Sweet Child o’ Mine.’ ”

The billionaire later threw his hand up in the air in “sort of a poor man’s Jersey Shore fist pump.”

Gates was boogying at the table with “Waiting for Superman” director Davis Guggenheim and his wife, actress Elisabeth Shue.

The tech titan had been hyping the film, blogging that he was particularly excited to see it.

“This will be the first time I’ve attended Sundance,” he wrote.

And he clearly wanted to make it a memorable experience.

At another bash, Gates chatted up filmmaker Ondi Timoner, the auteur behind documentaries “DiG!” and the upcoming “We Live in Public,” sources said.

Later, when he was hanging at the Bing Bar, an excited fan ran up to the world’s richest man and asked, “Oh, my God! Can I give you a kiss?”

lukas.alpert@nypost.com

Photos courtesy of TheDailyTruffle.com .