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Windows 7: Changing drive letter back to c:\

16 Aug 2009   #1
acars12

windows 7 pro 64bit
 
 
Changing drive letter back to c:\

I recently upgraded to the full version on win 7 pro. I installed it on a partition labeled D:\. After reloading my programs and double checking to make sure all work I deleted the partition that had win7 rc on it which was C:\ then expanded my d: partition to regain all my drive space. Now I only have 1 partition which is drive D:\. I want to change the drive letter to C:\ but will it screw up the registry entries for all my files and programs? Can I change D: to C: or should I just leave it.
When I boot up from my win7 install disc and choose the repair option it shows my disk as C: strange??
any ideas?


My System SpecsSystem Spec
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16 Aug 2009   #2
logicearth

Windows 10 Pro (x64)
 
 

Just leave it as is...unless you want to start all over again.
My System SpecsSystem Spec
16 Aug 2009   #3
acars12

windows 7 pro 64bit
 
 

Are we sure of this?
My System SpecsSystem Spec
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16 Aug 2009   #4
zigzag3143

Win 8 Release candidate 8400
 
 

Quote   Quote: Originally Posted by acars12 View Post
Are we sure of this?
Hey acars

you have 2 choices. First leave it. Second change it (and maybe have to do a clean install). Which would you like to do? Me Im not the cautious type.

Ken
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16 Aug 2009   #5
Muad Dib

XP Pro & Vista Home Premium (x86); Windows Ultimate 7600 x64 Retail
 
 

Got a good IMAGE backup tool? Recommend you do an image backup before trying to change it.
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16 Aug 2009   #6
SquonkSC

Win7 Build 7600 x86
 
 

Quote   Quote: Originally Posted by acars12 View Post
Are we sure of this?
don't change it.

You'll screw up the install 100% positive!!

edit: and yes, all your registry entries and settings entries point to d:.

They won't know where to find it after you change to C:

Unless you want to change a couple of hundred thousands of registry entries, or do a clean install, don't change it.
My System SpecsSystem Spec
16 Aug 2009   #7
chuckr

XP_Pro, W7_7201, W7RC.vhd, SciLinux5.3, Fedora12, Fedora9_2x, OpenSolaris_09-06
 
 

Quote   Quote: Originally Posted by acars12 View Post
I installed it on a partition labeled D:\.
I deleted the partition C:\
then expanded D: partition to regain all drive space.
Now have 1 partition D:\.

I want to change the drive letter to C:\
but will it screw up the registry entries for all my files and programs?
Can I change D: to C: or should I just leave it.
win7 install disc shows my disk as C:
I'm not saying here that you should change it or should not change it..

Rather, posting some random thoughts and questions.
Before actually doing anything, the disk image backup advice is an absolute must.

The OP should only have "Disk_0,Partition_1" IAW his posting.

The D: should just be a letter.
The 'registry' seems to be the main concern about this.
Note: this is not for others who have more than 1 partition, OP only,
since he did the actual deletion/merging:
Is this letter ( D: ), in fact, carried through your current 'registry'?
Can the OP be 100% sure about this? Can you post a pic?

For Others:
(Can a registry search be done to prove/disprove this?)
If his registry is carrying 'D:\' for items, how can the OS find them?
What mechanism is used here?

W7 says he is C: which should be 'Disk0_Partition_1',
all programs should now be on 'Disk0_Partition_1',
and the registry has pointers to D: ???

Somehow, this doesn't seem to jive right, to me.
It strikes me that if the OperatingSystem's "Disk Management" or "diskpart" allows OP to change the D: to C: (which it may or may not allow),
then the OperatingSystem should have the 'brains' to change all Registry-entries containing D:, to the new letter C: .
I thought that's what OSs are supposedly for, to keep track of things...

I believe that the letter D: is just that -- a letter.
Running 'diskpart' from the W7 booted DVD should confirm that.
Could you post a list of your "diskpart" output results?
i.e:
list disk
list volume

If there is a "D:" it should be the DVD drive.
If the OP Registry does have ( D: ) in it, then its more screwy than I could have ever imagined.
OTOH, I don't know a bloody thing about the Registry, that's why all the bloody dumb questions...
My System SpecsSystem Spec
16 Aug 2009   #8
Antman

 

The picture below is just a quickie. There are numerous other inclusions, even things like C\, C, (D\ D), and other oddities. Pointers, relative pointers...

Any installer or app can write to the registry. Many installers and apps include GOTO - to put it in perspective for you.

OP and Chuck - it is simply not a good idea. It is maybe the worst idea right after using 240 AC to speed up the PC. I will gladly assist in the recovery of this system at shop prices.


Attached Thumbnails
-1ture.png  
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16 Aug 2009   #9
Muad Dib

XP Pro & Vista Home Premium (x86); Windows Ultimate 7600 x64 Retail
 
 

You mean using 240 AC is not what they mean by increasing the RAM voltages?

Dang it, I knew there was a trick to it! I better go and change that post I made in another forum...
My System SpecsSystem Spec
17 Aug 2009   #10
SquonkSC

Win7 Build 7600 x86
 
 

@ OP and ChuckR,

My advise to not do it, is not based on a guess.

I have tried it a few times on different OS's just for the fun of finding out if it could be done.

I even had the tools to go through registry and automatically change all instances of d: to c:

But there are a lot of registry pointers in hex numbers, and all kind of other numbered references that represent the bootdisk.

A lot of apps use ini files with references.
You would have to go through those also.

But before I ever got to the point of changing everything, my OS would go into all kinds of BSOD and errors.

I never made it through without wrecking my OS.


Is it impossible? No, probably not.

Is it worth the trouble? Definitely not!

Greetz
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