Upgrade Vista on a dual boot PC

[HP81]

I have a PC that dual boots with XP & Vista home premium. I installed Vista from within XP, during this process it gave me a choice of drive partitions to install it on etc. I assumed that in order to preserve the boot order options I would need to upgrade Vista from within XP as with the installation, however when I sellect upgrade, rather than install, the drive options don't appear it just goes straight on to upgrade XP.
My question is, if I run the upgrade from within Vista will I loose the dual boot option at start up? If so how can I get it back? I want to keep XP for now, but need to upgrade Vista also.

HP81

[alec]

I partioned the hard drive so that xp is on one, and win7 is on the other. At boot-up I have the choice which o/s I used. They both upgrade ok. XP is the original o/s and on boot-up with win7 in the rom it will ask you which partition to put it on. You should have at least 2 partions, so that you put it on a different one to XP.

[dasteph]

I have a PC that dual boots with XP & Vista home premium. I installed Vista from within XP, during this process it gave me a choice of drive partitions to install it on etc. I assumed that in order to preserve the boot order options I would need to upgrade Vista from within XP as with the installation, however when I sellect upgrade, rather than install, the drive options don't appear it just goes straight on to upgrade XP.
My question is, if I run the upgrade from within Vista will I loose the dual boot option at start up? If so how can I get it back? I want to keep XP for now, but need to upgrade Vista also.

HP81

if you are upgrading from one version of vista to another read the following link and
when asked which partition make sure you pick the partition with vista on.

How to Upgrade Windows Vista Business to Ultimate | eHow.com

[HP81]

I tried this today & the point is that it doesn't offer a choice of partition when done through XP. What I am wondering is, if I upgrade from within Vista will I loose the XP boot option?
If so can I restore it?

[dasteph]

try changing the first boot option in the bios to cd then when the installation starts you should get the choice of partition.

[HP81]

Job done! In the end I logged into Vista and ran the upgrade disc from there. It all went to plan & I still have the dual boot option at start up.

[james951]

hello its preferly to install xp in frtst time and vista second .boot working 100%