Computer freeze for 30 seconds after LOG IN

When I start the game for first time a day when I type my password and click Log In computer freeze for a 30 seconds and I cant click anything . PC Config : Microsoft Windows 7 Professional Service Pack 1 QuadCore Intel Core i7-2600K, 3500 MHz (35 x 100) 16331 MB (DDR3-1600 DDR3 SDRAM) AMD Radeon HD 7800 Series (2048 MB)