Hi Mark,
There is no uninstalling an NT to NT upgrade, there never has been. That was
only an option for 9x to NT upgrades (and didn't always work that well). To
remove the installation on C:, simply delete the Vista system folders and
modify the boot using bcdedit from an elevated command prompt. Do not format
C: as that is likely the system drive and contains the boot files. If you
do, you'll need to run a repair by booting the Vista DVD.
And yes, telephoning in the activation is the only option, there is no
"deactivate" method.
--
Best of Luck,
Rick Rogers, aka "Nutcase" - Microsoft MVP
http://mvp.support.microsoft.com/
Windows help -
www.rickrogers.org
My thoughts
http://rick-mvp.blogspot.com
"Mark" <> wrote in message
news:BE10D748-D891-4153-95D5-...
> Of course I want to remove the version on C: - but the uninstall process
> is
> not straightforward. When you upgrade from XP you cannot use uninstall
> programs in Control Panel. Ideally I would just deactivate the old copy.
> At
> the moment the dual usage helps as I check out that all old programs and
> files still work and are available on the new version. I will of course
> telephone MS if this is the only option.
>
> "Rick Rogers" wrote:
>
>> Hi,
>>
>> Of course it's in use, you already activated it on C:. You'll need to use
>> the phone activation method to activate M: assuming that you are removing
>> the installation on C:.
>>
>> --
>> Best of Luck,
>>
>> Rick Rogers, aka "Nutcase" - Microsoft MVP
>> http://mvp.support.microsoft.com/
>> Windows help - www.rickrogers.org
>> My thoughts http://rick-mvp.blogspot.com
>>
>> "Mark" <> wrote in message
>> news:871C675C-E08E-412D-BAC2-...
>> >I upgraded to Vista Home Premium over XP on my C: drive. Overtime
>> >performance
>> > became very poor. So, I did a clean install but to a new partion on
>> > another
>> > hard Drive M:.
>> >
>> > On boot up I get a choice of partitions. However when I try and
>> > activate
>> > my
>> > new M: drive version I am informed the product key is already in use.
>> >
>> > What should I do - format my C: Drive ? Any other tips ?
>>
>>