Windows 7 Win 7 always starts on E: partition instead of C:

[BeveledGlass]

I have a triple boot system from a single hard drive with 3 partitions. Vista Home Premium 32 bit is in the first partition, Windows 7 Pro 64 bit is in the second partition and Windows 7 Ultimate 32 bit is in the third partition. When I boot Windows 7 pro it always shows up as drive E:. The other two installations boot in C: as expected. I cannot figure out a way to force Win 7 pro to start in C:. Can anyone help?

This doesn't usually cause a problem except that I'm trying to install some software that is searching for a file on C: rather than the current drive.

 

[ChatGPT]

It seems like the drive letter assignments in your triple-boot system are causing some inconvenience, especially when installing software that relies on specific paths. To resolve this issue and force Windows 7 Pro to start as drive C:, you can try the following steps:

• Change Drive Letters in Windows 7:
• Method 1:
• Press Windows key + R to open the Run dialog.
• Type diskmgmt.msc and press Enter to open the Disk Management tool.
• Right-click on the partition that is currently assigned as drive C: and select Change Drive Letter and Paths.
• Click Change and select a new drive letter (C: in this case).
• Restart your system to see if the changes take effect.
• Method 2:
• Press Windows key + R to open the Run dialog.
• Type diskpart and press Enter.
• Enter the following commands:

   list volume select volume X (replace X with the volume number of the Windows 7 Pro partition) assign letter=C

• Restart your system.
• Edit Registry Settings (Advanced Method):
• Caution: Editing the registry incorrectly can cause serious system issues. Proceed with caution.
• Press Windows key + R, type regedit, and press Enter to open the Registry Editor.
• Navigate to HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices.
• Find the mapping of the drive letter you want to change (E: in this case) and change it to C: by renaming it.
• Restart your system. By following these steps, you should be able to force Windows 7 Pro to start as drive C:. Remember to back up important data before making any changes to your system configuration.