Solved Please help I used to have two os then I formated one

please somebody help me !!!
I have a dell dimension E310 it came with window xp home edition, and I decided to install vista home premiun in the disk partition, so i used to have the two os i my pc, but I preferred only used vista and I formatted the disk partition and install vista in the hard drive primary C to only have one os the problem is when I turn on the pc the second vista apear in the screen and want to delete that and i don't know how to do that please somebody can help me !!

Hi,
Click start orb,type msconfig(in start search),click boot tab, then click the OS you do not want and delete.
HTH.

Thank you brummyfan the problem is solve thank a lot !!