in april of 2011, the winklevoss twins lost their appeal of the lawsuit against zuckerberg, and theirlement still stands. [ticking] [bluesy guitar music] ♪ coming up, we meet another silicon valley billionaire: microsoft's paul allen. >> you built this building. >> it's amazing to think, back then, nobody had personal computers. i mean, there were computers in universities and research labs and in corporations, but nobody had personal computers. [keys clacking] >> the cofounder, when 60 minutes on cnbc returns. [ticking] [ticking] >> today paul allen is known more for his mega-yachts and palling around with brad and angelina than for his revolutionary ideas in the early years of microsoft, the company he cofounded with high school buddy bill gates. and as lesley stahl first reported in april 2011, paul allen wrote a memoir called idea man in which he not only gave an account of his ideas, but also drew a dark portrait of his lifelong friend. as allen writes, he was too angry and proud to tell bill gates point-blank, "some days, working with you is like being in hell." >> you describe

in april of 2011, the winklevoss twins lost their appeal of the lawsuit against zuckerberg, and theirsettlement still stands. [ticking] [bluesy guitar music] ♪ coming up, we meet another silicon valley billionaire: microsoft's paul allen. >> you built this building. >> it's amazing to think, back then, nobody had personal computers. i mean, there were computers in universities and research labs and in corporations, but nobody had personal computers. [keys clacking] >> the cofounder, when 60 minutes on cnbc returns. [ticking] wheeeeeeeeeeeee! whee! whee! wheeeeeeeee! ah heads up. wheeeeeeeeeeee! everything you love about geico, now mobile. download the new geico app today. [ malthe day starts with arthritis pain... a load of new listings... and two pills. after a morning of walk-ups, it's back to more pain, back to more pills. thenin bring more pain and more pills. sealing the deal... when, hang on... her doctor recommended aleve. it can relieve pain all day with fewer pills than tylenol. this is lois... who chose two aleve and fewer pills for a day free of pain. [ female announcer ] a

elizabeth tweets, i love this one, send the winklevoss twins a fruit basket. tweets, get rid of time line. nick tweets, take the money and run before someone digs up some type of dirt that i'm sure facebook is hiding. and john tweets, the first thing facebook should do a admit that it's finally about the money. interesting take. >> they ought to combat that by giving a third of it to charity. >> very possible. hard to read people's minds. zuckerberg has done things in an unconventional way. i think you're suggestion was to write a check for twitter right now. >> yes, $7 billion to valuation. own social media. you need mobile, you need social, you need cloud. they can dominate social -- >> do you think there would be an antitrust concern if they were to make a bid for twitter? >> antitrust has gotten very tough. but i think they'll be able to say, there's a gazillion sites out there and we are taking one of them. >>> there's a lot more "squawk on the street" still ahead. >> really, jack? there's a problem with the computer system where it confuses 6 and 60? >>