There is no way for diskmgmt.msc to push the C: out until the 'extended'
partition is deleted. You might be enough geek to use Achronis (or whatever
backup) to stash your partition data elsewhere and rearrange the available
space on your drive to proportion it as you prefer. Not a task for the faint
of heart.
Let's assume for a second I was doing this. I have original media in hand to
boot to the 'recovery' screen, I own a second drive, or a burner with a
passel of writable disks. My version of Vista includes "Complete PC Backup"
(or I master the use of a good backup or mirror app like Achronis) and I'm
feeling especially brave today

I would:
Make a backup that will be available from the 'recovery' boot up.
Wipe out my drive
Repartition
Boot to install media recovery screen
Restore from backup.
(Promise myself to Never own another system without a second hard drive)
--
Was this helpful? Then click the Ratings button. Voting helps the web
interface.
http://www.microsoft.com/wn3/locales...eAPostAsAnswer
Mark L. Ferguson
..
"jmarsico" <> wrote in message
news:637F31FB-3A1E-4976-AB48-...
> Hey all, I hope this is the right forum for my question, but feel free to
> direct me elsewhere if not.
>
> I posted this question on another Vista forum but, despite other posters'
> efforts, I could not solve the problem. So I hope I have more luck here.
> Simply, the trouble I'm having is that I need to extend a partition on my
> HDD. When I first created the partitions when I put the computer together,
> I
> didn't leave enough space on the partition that holds the OS, because I
> forgot that it would need room in the future for things like updates. So,
> when I tried to install Service Pack 1, I found that there was not enough
> space for it.
>
> For some reason, the disk management utility will not allow me to extend
> that particular partition, even though I definitely have free space on the
> drive. (Just to make sure of that, I've shrunk other partitions and then
> tried to add that now-free space to the OS partition, but still no luck.)
> I
> really have no idea what else to try, because I'm not all that technically
> savvy to begin with...
>
> Let me know if I can provide any more details to help with an answer.
> Thanks
> for reading.