Windows 10: Why is C the default Windows System Drive letter always?

Some of us have a laptop, and some have a desktop. But one thing that is common in all Windows computer systems is that the system hard drive on which the operating system is installed is C. The Microsoft Windows operating system always uses the default letter C for the primary hard drive, where all […]

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Reformatting - Wrong Drive Letters?

Ok, do so googling about acronis True Image 11 and disk letters. Its the program I use to save all my info, and I know that people wee having troubles with the drive letters there. It was something about modifying the boot.ini and assigning drives. Anyway, I found this for you:

Change the System/Boot Drive Letter
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 (How to back up and restore the registry in Windows) How to back up and restore the registry in Windows
1. Make a full system backup of the computer and system state.
2. Log on as an Administrator.
3. Start Regedt32.exe.
4. Go to the following registry key:
HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices
5. Click MountedDevices.
6. On the Security menu, click Permissions.
7. Verify that Administrators have full control. Change this back when you are finished with these steps.
8. Quit Regedt32.exe, and then start Regedit.exe.
9. Locate the following registry key:
HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices
10. Find the drive letter you want to change to (new). Look for "\DosDevices\C:".
11. Right-click \DosDevices\C:, and then click Rename.

Note You must use Regedit instead of Regedt32 to rename this registry key.
12. Rename it to an unused drive letter "\DosDevices\Z:".

This frees up drive letter C.
13. Find the drive letter you want changed. Look for "\DosDevices\D:".
14. Right-click \DosDevices\D:, and then click Rename.
15. Rename it to the appropriate (new) drive letter "\DosDevices\C:".
16. Click the value for \DosDevices\Z:, click Rename, and then name it back to "\DosDevices\D:".
17. Quit Regedit, and then start Regedt32.
18. Change the permissions back to the previous setting for Administrators (this should probably be Read Only).
19. Restart the computer.

 

help. USB drive isn't assigned a drive letter.

Any usb flash drive I plug into my computer isn't assigned a drive letter. The physical drive shows in the "safely remove hardware" but it doesnt show up in disk management. I have tried to populate the volume thru the safely remove hardware properties window and it does pop up in the list but it doesn't stay there. This isn't a format or assign a letter problem. It's more complicated then that. Maybe one of the services needed for usb drive management was disabled? Suggestions needed. btw external usb harddrives work fine.

 

Cloning to SSD then swapping drive letters


@SamHobbs
What you want done is very simple and can be done in short period of time. Here's my suggestion:
There's 2 modes that Windows can be installed: UEFI and the old legacy MBR. Open Disk Management, look at the disk where your C drive is, if there's a

1. EFI System Partition, your Windows was installed using UEFI.
2. System Reserved partition, your Windows was installed using MBR

Next, Connect your SSD to an available Sata port (no need to format or do anything). Download: Macrium Reflect Free . Install and run. Follow the steps below:

1. From Macrium, click on image this disk under your C drive and save it to either an Internal or External Drive. This will create a single backup image of the whole disk containing your C drive.
2. Again, from Macrium, click on Restore tab and select the image created from step 1, Select your SSD as the destination drive, click Next->Finish
3. Exit Macrium. If your Windows was installed using MBR, Open disk management and make sure the SSD is marked "Active" else go to next step.
4. Shutdown your PC. Disconnect the HD containing Windows C drive then connect your SSD to it.
5. Reboot. Your PC should boot and the Windows should have C as the drive letter.

NOTE: The procedure above is to backup your Windows to an image file then copy it back to the SSD. This ensures proper cluster size aligment for the SSD. In addition, Macrium also perform Trimming for the SSD. This is more preferable than cloning.