System (Z:) partition suddenly showing up on Win10 PCs


  1. Posts : 1,254
    Windows 8.1, Win10Pro
       #1

    System (Z:) partition suddenly showing up on Win10 PCs


    I'm seeing reports in other forums about folks suddenly having a 256MB FAT32 SYSTEM (Z partition appearing on their PCs!

    One person did mention they had used a VPN app (which might have created this), but none of the others have done anything like that.

    Anyone have any ideas we can investigate??
      My Computer


  2. Posts : 4,143
    Windows 3.1 to Windows 11
       #2

    Z is usually a Virtual Disk
      My Computer


  3. Posts : 1,254
    Windows 8.1, Win10Pro
    Thread Starter
       #3

    OK ... but folk are wondering how it got there (since they say they did nothing) and when they try to access is or remove it, they get permission denied!
      My Computer


  4. Posts : 17,661
    Windows 10 Pro
       #4

    Any links to these posts?
      My Computer


  5. Posts : 14,019
    Win10 Pro and Home, Win11 Pro and Home, Win7, Linux Mint
       #5

    By default Windows starts assigning the drive letter Z: to Networked drives such as a NAS/Network Attached Storage then works back up the alphabet for additional such drives. I have 2 NAS drives attached to my Router, first one was Z: and the second I added became Y:. All computers working through the Router can access the drives after they are Mapped.
      My Computers


  6. Posts : 1,254
    Windows 8.1, Win10Pro
    Thread Starter
       #6

    Kari said:
    Any links to these posts?
    There are others, but this is one I could find quickly: http://h30434.www3.hp.com/t5/Noteboo...d/td-p/5587307
      My Computer


  7. Posts : 19,518
    W11+W11 Developer Insider + Linux
       #7

    Look at disk management and if it's not there it has to be some virtual or network drive. If it is a partition on disk, you can take it's letter off.
      My Computers


  8. Posts : 2,667
    Windows 11 21H2 (22000.593)
       #8

    256 MB is a pretty small partition, if it is physical.
      My Computers


  9. Posts : 19,518
    W11+W11 Developer Insider + Linux
       #9

    johngalt said:
    256 MB is a pretty small partition, if it is physical.
    Had one of that size on my SSD and it was for GC and LL and at one time after an update it suddenly got a letter. It was made by program for updating FW on that SSD.
      My Computers


  10. Posts : 2,667
    Windows 11 21H2 (22000.593)
       #10

    I know, but auto assigning it a drive letter with such small space is pretty ridiculous. Seems the firmware update package did not mark the partition correctly, as in making it active during reboot so it could flash the firmware, but then making it inactive again so that Windows would not detect it.
      My Computers


 

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