In that same "Authentication" screen where you enabled the Anonymous, should be the bottom in the list. Right click disable it , then make sure to restart IIS.
Computer type PC/Desktop System Manufacturer/Model Number Personal build OS Genuine windows 7X64 CPU AMD Phenom II X4 965 Processor Motherboard Asus Sabertoothe 990 FX R2.0 AM2+/AM2 AMD MB Memory 8 Gigs Corsair Vengance DDR3 1886 MHZ Graphics Card EVGA GTX 650 SSC Sound Card On board Monitor(s) Displays ASUS VE247H 24 inch
PSU Corsair 750 Watts Case Gigabyte case Cooling Zellman 9800 Hard Drives Samsung 120GB 2.5-inch SSD 840 SATA III Internet Speed 20 megs
Computer type PC/Desktop System Manufacturer/Model Number Personal build OS Genuine windows 7X64 CPU AMD Phenom II X4 965 Processor Motherboard Asus Sabertoothe 990 FX R2.0 AM2+/AM2 AMD MB Memory 8 Gigs Corsair Vengance DDR3 1886 MHZ Graphics Card EVGA GTX 650 SSC Sound Card On board Monitor(s) Displays ASUS VE247H 24 inch
PSU Corsair 750 Watts Case Gigabyte case Cooling Zellman 9800 Hard Drives Samsung 120GB 2.5-inch SSD 840 SATA III Internet Speed 20 megs
ok i fixed it. i uninstalled IIS then reinstalled it, and now can access my site and my friends can now access the site without using a username and password,
thanks for all the help
Computer type PC/Desktop System Manufacturer/Model Number Personal build OS Genuine windows 7X64 CPU AMD Phenom II X4 965 Processor Motherboard Asus Sabertoothe 990 FX R2.0 AM2+/AM2 AMD MB Memory 8 Gigs Corsair Vengance DDR3 1886 MHZ Graphics Card EVGA GTX 650 SSC Sound Card On board Monitor(s) Displays ASUS VE247H 24 inch
PSU Corsair 750 Watts Case Gigabyte case Cooling Zellman 9800 Hard Drives Samsung 120GB 2.5-inch SSD 840 SATA III Internet Speed 20 megs