OS Windows 7 64 bit CPU i7 Motherboard Gigabyte UD5 Memory 6gb Gskill matched DDR3 Graphics Card Radeon HD4600 Sound Card All onboard Monitor(s) Displays HP 2159v
PSU Corsair 750w Case Antec 920 Cooling Aksas Nero Hard Drives 2 * 1tb WD Caviar Black Raid 0
Open Windows Calculator, click on View > click on Programmer.
Input the number you want 100 in this case, then multiply [ * ] button, input this number: 1073741824
Then at the far left end of the calculator, there is a group of radio buttons, select the one labeled: hex.