If you're absolutely certain it's not a scam...then I congratulate you, Mr. Renton (yes, you now have enough money to apply the prefix of 'Mister' to your name. Also congratulatory)
Think hard and think long on how to use it, as it's a once-in-a-lifetime-stroke-of-luck. Some people just can't handle a lot of money and tend to toss it away on whim and soon notice they're all out again. Me, I've never had money, really, so I've always been running a Scrooge-shift.
Don't think I'll wind up with an inheritance during my lifetime. Or if I do, it's prolly bills, anyway.