Learn how to Bypass The Vista Windows Boot Manager Screen
1) click start > all programs > accessories
2) right-click on the command prompt shortcut and choose “Run As Administrator”from a command prompt: Run -> CMD -> Enter
Type: bcdedit /set {bootmgr} displaybootmenu No
Just to make sure the timeout isn’t an issue, set it to 5 seconds or so if the above command didn’t correct the problem:
bcdedit [...]
