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Windows 7: How to change drive letter for boot drive?

25 Jul 2009   #11
copernicus

7264x64/7260x86
 
 

When you install an OS and start the setup from within another OS you'll never have the new OS installed onto "c:" if the old OS has itself on "c:".


My System SpecsSystem Spec
.
25 Jul 2009   #12
fafner

Windows Vista and Windows 7
 
 

Quote   Quote: Originally Posted by copernicus View Post
When you install an OS and start the setup from within another OS you'll never have the new OS installed onto "c:" if the old OS has itself on "c:".
Ah...you are right. The other times I did a dual install like this I installed both from DVD's. I guess I am stuck the way I am for the moment.

fafner
My System SpecsSystem Spec
25 Jul 2009   #13
busydog

windows 7
 
 
MS Link to Your Problem

My System SpecsSystem Spec
.

26 Jul 2009   #14
fafner

Windows Vista and Windows 7
 
 

Quote   Quote: Originally Posted by busydog View Post
Thank you for that link. I had been to that page before and was concerned that doing that would cause my system not to boot at all. I found out, however, that I had mistakenly installed 32 bit Win7 instead of 64 bit, so I was resigned to doing a reinstall anyway.

So I followed the instructions in that link and found something interesting that I thought others might like to see. After doing that I attempted to boot into Windows 7 and lo and behold, I got the Windows 7 splash screen, then wierdly, a message that said "preparing your desktop." The donut keep spinning for about 5 minutes and then I pale blue screen with "Windows 7,Build 7600, This is not genuine" in the bottom right hand corner. And, the donut kept spinning. I could access Task Manager or log off etc., but a real desktop never appeared. Due to time pressure, I logged off and went back to Vista where I now am. Later I will try to boot into Win7 again before I do an install of the x64 bit version.

If anyone has any thoughts on what is happeing I would love to hear them.

Thanks.

fafner
My System SpecsSystem Spec
26 Jul 2009   #15
copernicus

7264x64/7260x86
 
 

Quote   Quote: Originally Posted by fafner View Post
Thank you for that link. I had been to that page before and was concerned that doing that would cause my system not to boot at all. I found out, however, that I had mistakenly installed 32 bit Win7 instead of 64 bit, so I was resigned to doing a reinstall anyway.

So I followed the instructions in that link and found something interesting that I thought others might like to see. After doing that I attempted to boot into Windows 7 and lo and behold, I got the Windows 7 splash screen, then wierdly, a message that said "preparing your desktop." The donut keep spinning for about 5 minutes and then I pale blue screen with "Windows 7,Build 7600, This is not genuine" in the bottom right hand corner. And, the donut kept spinning. I could access Task Manager or log off etc., but a real desktop never appeared. Due to time pressure, I logged off and went back to Vista where I now am. Later I will try to boot into Win7 again before I do an install of the x64 bit version.

If anyone has any thoughts on what is happeing I would love to hear them.

Thanks.

fafner
Quote:
Warning Do not use the procedure that is described in this article to change a drive on a computer where the drive letter has not changed. If you do so, you may not be able to start your operating system. Follow the procedure that is described in this article only to recover from a drive letter change, not to change an existing computer drive to something else. Back up your registry keys before you make this change.
From the link. You can't just change the driver letter of an OS install.
My System SpecsSystem Spec
26 Jul 2009   #16
fafner

Windows Vista and Windows 7
 
 

Quote   Quote: Originally Posted by copernicus View Post
From the link. You can't just change the driver letter of an OS install.
Yes I can read. The interestsing thing is that I did it and it almost works....with OS's prior to Win7 I would never get as far as I did.

fafner
My System SpecsSystem Spec
15 Dec 2009   #17
Patyacht

Windows 7
 
 
Same Boat

So I'm in the same boat. I bought a new drive, installed XP because I only had the Upgrade version of Win 7. Did the Custom install and the Boot Drive letter is "L". I tried the fixes discussed like the regedit one that ended up with the same blank blue screen with "Windows 7,Build 7600, This is not genuine" and I tried using the computer management route with the same error "The parameter is incorrect".

So is there a fix or do I have to live with the boot drive being the "L" drive?
My System SpecsSystem Spec
15 Dec 2009   #18
gregrocker

 

There is no way to change the drive letter of an OS drive without risking failure. I tried it twice and failed twice; I won't try it again.

What you can do is pre-format your partitions and clear the way for it to take the letter C by assuring your optical drive is D in Disk Managment.

Never install an OS from the other OS unless necessary, always boot from the HD and apply a final formatting to assure it's ready for the OS.
My System SpecsSystem Spec
15 Dec 2009   #19
Patyacht

Windows 7
 
 

I'm not trying to dual boot. The only reason I put XP on the drive is because I only had the Upgrade version of Win 7. I think it is a Win 7 issue in that it sees XP, Keeps it on C Drive while it looks for the 1st free letter to install Win 7. I'd think MS would be smarter than that. I wonder if I zapped it all, reformated the disk and then tryed to install Win7 upgrade without XP being on the disk if the install would ask for proof of XP like the original disk.
My System SpecsSystem Spec
15 Dec 2009   #20
gregrocker

 

You didn't need XP to be installed to use Win7 Upgrade DVD.

It doesn't ask for proof of XP, only scans the HD to see any OS is installed before accepting the key, even if booted. There is a workaround given out by MS to install Upgrade if no OS is present.

So get the cleanest possible install by booting from the DVD, selecting Custom intall, and use Advanced drive tools to format before install. It will see the XP before formatting over it, accept your Upgrade key and install.
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 How to change drive letter for boot drive?




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