I just got a HP Envy Touchsmart Quad laptop. I found that Recovery Partition is assigned the drive letter D.
I shrunk the C drive to have another partition and wanted to name it as D. I wanted rename the Recovery Partition to have the letter E. The DiskManagement under Computer Management does not have an option to rename
this Recovery partition. I could not find the solution by googling but there was a clue. Here is how.
1. Window Key and R to bring up Run dialog.
2. Type "DiskPart" in the command line window.
3. "list volume" to find out the volume number for the Recovery partition.
4. "select volume 2" (in my case it is volume 2).
5. "attribute volume set hidden" to hide the partition.
6. Now the drive letter D is gone.
7. Get out of DiskPart
8. You can rename your extra partion to "D" now, using the Disk Management.
If you want to see the Recovery partition (HP Recovery Manager needs to see it), do the process above to item 4.
do "attribute volume clear hidden". This will automatically assign drive letter (in my case it now has E).
HP Recovery Manager finds the Recovery Partition correctly (even though the drive letter is different).
Hope that this is helpful.