Hello Gilbert...
Keep in mind that this is a Windows 7 forum. You may post your Vista questions in the sister forum:
Vista Forums Solution for you:
Download EasyBCD and install it.
Open it , and go to add/remove entries...Select your old Vista entry and press delete, save.
You're done.
Download EasyBCD 1.7.2 - NeoSmart Technologies
scroll to the bottom of the linked page