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 /set {bootmgr} timeout 5
You need administrator right to do this task…
You can also try these tools:
EasyBCD is NeoSmart Technologies’ multiple award-winning answer to tweaking the new Windows Vista bootloader.
http://neosmart.net/dl.php?id=1
VistaBootPRO
Chances are you’re here because you’re running Windows Vista and want to do one of two things. Install a second OS or manage your boot configuration without directly editing the BCDEdit file. As you likely now realize, Windows Vista has made this task somewhat complicated for most users. VistaBootPRO was developed to make changes to the Windows Vista Boot Configuration Data (BCD) registry quickly and easily, doing the job in a fraction of the time it would take using the alternative. The only other way to edit the BCD is to use the command prompt application “bcdedit.exe,” located in the Windows\system32 folder of Windows Vista, which requires users to become familiar with the ins and outs of the bcdedit.exe switches and options, leaving many frustrated users in its path. VistaBootPRO allows users to easily and neatly organize their boot configuration entries from within all flavors of Windows.
http://www.vistabootpro.org/
BCDEdit Command-Line
http://technet.microsoft.com/en-us/library/cc709667.aspx
Problem
Executing bcdedit gives, “The boot configuration data store could not be opened. Access is denied.”
Solution
In Start Menu, right click on Command Window, run as Administrator, before attempting this command.
1) click start > all programs > accessories
2) right-click on the command prompt shortcut and choose “Run As Administrator”