Windows 7: changing from dual boot to all 7

okay, right now i am dual booting windows vista and windows 7 and have about 20 gigs devoted to 7 and 210 devoted to vista, and i just decided that i want to go completely to windows 7. i have had 7 on my computer for 3 months and have used vista maybe once in that period of time. what would be the best way of going about getting rid of vista without messing anything up? i have a huge external drive so i am able to back up anything i want and am not worried about loosing my installed programs if necessary. but if possible i would like to not have to totally format my comp (but will if necessary.) thanks

Take a back up of ur windows 7 partition with Acronis True Image or with any disk imaging software and then format the vista partition from 7 and and try to reboot, if it does then fine, if it doesn't then insert the Windows 7 bootable and repair start up problems and I think it should fix your MBR...,
Check for important Data on Vista Partition before formatting it...

Can i ask a related question.
Ive also decided to stay with Windows 7 and have XP on another partition.
Is it safe to wipe that partition? There is a boot file on it and its locked so formatting from outside windows seem to be the only option as i cant do it from within. Im pretty sure its to do with Windows 7 though so not sure what to do about it.
This is my first time dual booting so while im pretty sure it is safe i thought i would ask.

Cheers.

When you format or wipe ur partition and install XP after installing 7 (Which u already have it) The only thing which u'll face is ur XP boot will not recognise 7 so u need to fix it up... by the same method shown, if it doesn't then go to the tutorial, if it doesn't then download easybcd and add the entry... for the windows 7
Dual Boot Installation with Windows 7 and XP

You could check out this thread on how to move your boot files to the 7 partition. Then mark 7 partition as active.

http://www.sevenforums.com/performan...ent-drive.html

Thanks for the quick replies.
Ill check those links out tonight.
My PC boots in to Windows 7 fine, in fact there is hardly anything left on the XP partition. Its just that what is left i cant delete. I guess its the boot stuff that i cant delete.
I put a new 750GB HDD in my PC and thats running Windows 7 and comes up as the C: drive. The D: (old C: ) is on a different HDD but its still showing as active and i guess that's what's stopping me from being able to format it.

i used to have a dual boot of xp and windows seven with xp on my primary and 7 on a 50gig partition i just wiped the 7 partition and increased the primarys size back to normal formatted the primary and reinstalled Windows 7 simple.

Reinstalling may not be an option everyone may like....