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Renaming may not work if the user is reinstalling XP as Win7/win8, and the original hard disk partition name might not change. This is typically caused by modifying the partition using the Format fdisk under the XP system. In this case, how can we rename the hard drive partition to the name we want? In this paper, we will take the C-disk named Windows8 as an example, perform regedit into the following path:
[Hkey_local_machine\software\microsoft\windows\currentversion\explorer\driveicons]
If you do not have driveicons, create a new item (K) and name "Driveicons".
Then enter Driveicons new "item (k)", rename "C", then enter C New "item (k)" and rename to "Defaultlabel".
Let's go into Defaultlabel, open and modify the string value to "Windows8", then open My computer and see if it takes effect immediately?
Article Source: modify wndows hard disk partition
Modify the Windows hard disk partition name