Boil water for water bath. (Enough to fill a larger pan ½ way)
In mixer, beat cream cheese, sugar and flour with paddle attachment on medium low about 2 mins.
Beating on low will prevent air from getting into the batter and causing cracks.
Add eggs one at a time beating in med-low after each one. (Scrape down sides)
Add sour cream and vanilla: beat on medium low.
Batter should be creamy.
Crush Oreos and stir into batter.
Wrap the outside of springform pan with three layers of heavy duty foil. This will prevent water from getting in.
Pour batter over crust in place springform pan into a larger roasting pan.
Pour enough water until it reaches halfway up the spring form pan.
Bake cheesecake for 60-70 minutes until the middle 2 inches are jiggly.
Turn off oven and leave oven door cracked for 1 hour.
Remove from oven and place on counter.
Allow to cool another 30 minutes before removing from bath.
Remove foil and allow to cool 1 hour.