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Windows 7: Problems with driver letter after partitions changed

05 Mar 2010   #1
jpnascim

Windows 7 Ultimate x64
 
 
Problems with driver letter after partitions changed

Hello everyone,

This is my first post in this forum. I am glad I found it!

Well, I am having trouble booting my Windows 7 after I've made some changes to my disk partitions. Here is what I've done:

Before my changes, I had the following:

Hard Disk: 500 GB partitioned as follows:
  • Partition 1: Windows XP (boot)
  • Partition 2: Windows 7
  • Partition 3: My data
My Win7 used to have letter C: as system drive and everything worked fine. I then decided to remove Windows XP from my machine so I deleted partition 1 and used Linux Parted Magic to reorganize them so I have now:
  • Partition 1: Windows 7
  • Partition 2: My data

The problem was I forgot to flag WIN7 partition as "boot" and had problems to boot. Until I figure it out I tried to boot using Win7 DVD and performed a couple "Repair startup problems". Only after I used Parted Magic to flag it as boot partition I could get a boot loader repair done.

Now, my problem: When I boot Win7, it displays a message "Preparing your desktop" for 5 minutes and after that it displays a blank desktop (I can call Task Manager). It also says it could not find my profile. By opening a Command Prompt window here is my surprise: driver letter is changed to "D:"! Probably it is not finding anything because Win7 was installed with system partition as C.

I don't understand why this is happening. Letter C does not seem to be used by anyone. Anyone knows how to solve it?

PS: If I boot with Win7 DVD and open a command prompt window, I see system partition with letter "C:"

Thanks in advance,

Joćo Pedro


My System SpecsSystem Spec
05 Mar 2010   #2
Arc

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium 64 Bit SP 1
 
 

First of all , just get a Startup Repair , and dont use parted magic or gparted in this time. As windows 7 is installed in your machine, and just bootloader is missing, it will add it.

Your problem was that your windows 7 bootloader was installed in your xp partition, and it is deleted alongwith xp.

If it is still not working, open command prompt and type "DISKPART' and enter.
At diskpart prompt, type "list disk" and enter.
As you have only one disk, it will show Disk 0. Now tyoe "list partition" and enter.
Type "select partition 1" (if it matches with your windows 7 partition), there will be a messege that partition 1is now selected.
Type "active" and enter to set it active.
My System SpecsSystem Spec
05 Mar 2010   #3
iseeuu

 
 

In addition to the "Startup Repair" mentioned by Arc, you may also need to do a "Repair Install" ... meaning after booting to 7 (as best as you can) run the Install DVD from Windows 7: Repair Install

Cheers!
Robert
My System SpecsSystem Spec
05 Mar 2010   #4
Arc

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium 64 Bit SP 1
 
 

Quote   Quote: Originally Posted by iseeuu View Post
In addition to the "Startup Repair" mentioned by Arc, you may also need to do a "Repair Install" ... meaning after booting to 7 (as best as you can) run the Install DVD from Windows 7: Repair Install

Cheers!
Robert
Hi Robert! I am greatful to you, friend! You solved my problem to dual boot with ubuntu. Now I am wondering and so asking you that if a desktop is not accessible, is it possible to run a Repair Install ? I knew that it is to be started when I am in windows 7. (Please dont take it otherwise , friend! I honor your efficiency, and its just a query to enhance my knowledge.)
My System SpecsSystem Spec
05 Mar 2010   #5
iseeuu

 
 

Quote   Quote: Originally Posted by Arc View Post
Quote   Quote: Originally Posted by iseeuu View Post
In addition to the "Startup Repair" mentioned by Arc, you may also need to do a "Repair Install" ... meaning after booting to 7 (as best as you can) run the Install DVD from Windows 7: Repair Install

Cheers!
Robert
Hi Robert! I am greatful to you, friend! You solved my problem to dual boot with ubuntu. Now I am wondering and so asking you that if a desktop is not accessible, is it possible to run a Repair Install ? I knew that it is to be started when I am in windows 7. (Please dont take it otherwise , friend! I honor your efficiency, and its just a query to enhance my knowledge.)
Sure Arc, questions are always welcome, my friend!

If I read what jpnascim wrote correctly: "Now, my problem: When I boot Win7, it displays a message "Preparing your desktop" for 5 minutes and after that it displays a blank desktop (I can call Task Manager)." he says he can open a command prompt. If so he should be able to run "Setup" from the DVD and complete the "Repair Install". No promises though, may not work and he may need to try something else. Hopefully the "Repair Install" will correct the drive letter problem and give access to 7 again. He cannot change the drive letter of the Windows 7 partition from the Windows 7 partition.

Cheers!
Robert
My System SpecsSystem Spec
05 Mar 2010   #6
Arc

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium 64 Bit SP 1
 
 

Quote   Quote: Originally Posted by iseeuu View Post
Sure Arc, questions are always welcome, my friend!
He cannot change the drive letter of the Windows 7 partition from the Windows 7 partition.

Cheers!
Robert
So another one, please.
Can Free Download Partition Wizard help to change drive letter without changing or destroying settings (as it is bootable, and doesnt touch the data inside the partitions) ?
My System SpecsSystem Spec
05 Mar 2010   #7
iseeuu

 
 

Quote   Quote: Originally Posted by Arc View Post
Quote   Quote: Originally Posted by iseeuu View Post
Sure Arc, questions are always welcome, my friend!
He cannot change the drive letter of the Windows 7 partition from the Windows 7 partition.

Cheers!
Robert
So another one, please.
Can Free Download Partition Wizard help to change drive letter without changing or destroying settings (as it is bootable, and doesnt touch the data inside the partitions) ?
Good question. Windows has its own rules about assigning and saving drive letter identification. Other programs often rely on the BIOS to set the order of drives / partitions and give them letters. For example, I can assign drive letters to my data partitions however I wish. But if I boot to the Repair CD and use the command prompt to start "Diskpart", Diskpart will assign drive letters based on how drives and partitions line up in the BIOS, and may not be the same as what I have in Windows. So I do not know what drive letter Partition Wizard will use or if changing it will have any effect on how Windows assigns the drive letter.

One other possibility would be to use Partition Wizard to create a new "Primary" partition in front of the current Windows 7 partition and copy the contents of the Windows 7 partition to the new partition. Possibly by marking the new partition "Active", Windows would recognize it as the C: drive and be happy again? I don not know for sure ...

Cheers!
My System SpecsSystem Spec
05 Mar 2010   #8
Arc

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium 64 Bit SP 1
 
 

Quote   Quote: Originally Posted by iseeuu View Post
use the command prompt to start "Diskpart", Diskpart will assign drive letters based on how drives and partitions line up in the BIOS

Cheers!
I suggested Diskpart , thinking that as he has deleted the primary partition (active and having boot flag, too) diskpart may fix it

But I think men are to be a bit more concerned about their MBR while trying to having or to getting rid of dual booting between two windows os
My System SpecsSystem Spec
05 Mar 2010   #9
Arc

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium 64 Bit SP 1
 
 

Quote   Quote: Originally Posted by iseeuu View Post
One other possibility would be to use Partition Wizard to create a new "Primary" partition in front of the current Windows 7 partition and copy the contents of the Windows 7 partition to the new partition. Possibly by marking the new partition "Active", Windows would recognize it as the C: drive and be happy again? I don not know for sure ...

Cheers!
Having a Clean Install Windows 7 in the new active (c) partition (space for the partition is already there, as after deletion of xp the partition is neither formatted to a new one nor merged with another one)..... and then copying the documents from the other drive (where the previous installation was)..... Workable ?
My System SpecsSystem Spec
05 Mar 2010   #10
iseeuu

 
 

Quote   Quote: Originally Posted by Arc View Post
Quote   Quote: Originally Posted by iseeuu View Post
One other possibility would be to use Partition Wizard to create a new "Primary" partition in front of the current Windows 7 partition and copy the contents of the Windows 7 partition to the new partition. Possibly by marking the new partition "Active", Windows would recognize it as the C: drive and be happy again? I don not know for sure ...

Cheers!
Having a Clean Install Windows 7 in the new active (c) partition (space for the partition is already there, as after deletion of xp the partition is neither formatted to a new one nor merged with another one)..... and then copying the documents from the other drive (where the previous installation was)..... Workable ?
Yes, I could see how that might work, especially if a new clean install was important...
My System SpecsSystem Spec
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 Problems with driver letter after partitions changed




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