I've installed Win8 Pro 64-bit on a separate partition to run alongside my existing Win7 Ultimate 64-bit in a dual boot setup.
After the first time that Win 8 rebooted and I saw the boot manager menu for the first time, it was the new styled version in blue with a tile for Win 7 and Win 8 respectively. After completing the Win 8 configurations and doing some online updates via Windows Update, it rebooted again and now the fancy blue boot menu is gone and replaced with the old school DOS looking like version in black with plain white text.
I want the pretty blue boot menu screen back! How do I get it back? Why did it get replaced by the old black boot menu?

In Windows 8, do the following
Press Windows key + X
Click System
Click Advanced System Settings
Click the Advanced tab
Click Settings under Startup and Recovery
Make sure that Windows 8 is listed as the default operating system.
Click OK
Then Apply and OK