Error 1327 “Invalid Drive” while installing or updating applications in Windows


When trying to install or update an application, you receive an error message similar to the following:

Error 1327. Invalid Drive: Z:

I’ve encountered this error installing Google Earth and another application, and it also apparently happens with many others including Microsoft and Adobe applications.


These installers/updaters are failing to access the drive that one of your shell folders is on — probably your Personal folder, ‘My Documents’. This could be because:

  1. the hard drive is no longer attached or isn’t recognized by the system, or the drive was a mapped network drive that is no longer mapped,
  2. it’s a network folder / mapped drive on a computer or server that is not currently available, or
  3. it’s a network folder / mapped drive that the installer/updater doesn’t have access to.


Cause 1: the drive is no longer attached or mapped

Reattach the hard drive or map the folder back to the drive. If you need help with these, ask your administrator or local geek.

Alternatively, update the registry to point your shell folder to a location that exists on a drive that exists. You may follow the directions at either Microsoft or Adobe for updating your registry (they are essentially identical).

Cause 2: The network folder is on a computer or server that is not currently available

Try again when the server is available (or see #1 above).

Cause 3: The installer/updater doesn’t have access to the network folder / mapped drive

Ok, so this is really why I wrote this article. The second time I encountered this problem I had forgotten that this was the cause and how to fix it. It’s seldom mentioned, and it took me a little while to find the solution even the second time around…

The drive that your shell folder (again, probably ‘My Documents’) is on is a mapped network drive and is connected using your own user account. However, the application installer/updater is running as the Administrative user, which does not have access to your mapped network drives (even if you are an administrative user).

The way to resolve this is simple, seamless, and temporary. Let’s say that the network folder is \user\Robert LaThanh on a server named FileServer (so the full path would be \\FileServer\user\Robert LaThanh), and it’s mapped to the Z:‘drive. We’ll confirm these first (step #2)…

  1. Run the Command Prompt as Administrator.
    1. Click on the Windows Logo (Start Menu)
    2. Type ‘Command Prompt’
    3. Right-click on the ‘Command Prompt’ shortcut and choose “Run as administrator”
    4. Click “Yes” in the User Account Control security dialog to allow the Command Prompt to run
  2. Let’s verify that the drive is mapped but unavailable to the Administrator by typing net use at the command prompt. If this is the case, your output will look like this:
    C:\Windows\system32>net use
    New connections will be remembered.
    Status       Local  Remote                            Network
    Unavailable  Z:     \\FileServer\user\Robert LaThanh  Microsoft Windows Network
    The command completed successfully.
  3. Remap the network folder as Administrator by typing net use Z: "\\FileServer\user\Robert LaThanh". (The double-quotes aren’t necessary if the network path does not contain any spaces.)
    C:\Windows\system32>net use Z: "\\FileServer\user\Robert LaThanh"
    The command completed successfully.

That’s it!

Your installer/updater should now work. This won’t affect your ability to use that drive, and once you reboot, you’re back to normal.


24 responses to “Error 1327 “Invalid Drive” while installing or updating applications in Windows”

  1. Jeremy Avatar

    Well done. Thanks so much.

  2. Thank you very much! Why didn’t I find this on the Microsoft pages?

  3. Wow, finally! Thanks man.

  4. wellproc Avatar

    Finally somebody with a real solution to this problem. Thanks!

  5. […] Error 1327 occurs during any basic installation when there is an incorrect value in the Data field in some of the Microsoft Windows registry keys. This issue is addressed by Adobe in this article and by Robert LaThanh in this post. […]

  6. Thank you! This worked! I was searching google
    error 1327 invalid drive
    so that I can uninstall Microsoft Office. After running cmd as administrator and following those steps I was able to uninstall it. I was also able to install office through which was also giving me a 0x80070003 system cannot find the path error.
    super helpful for solving issues with mapped drives over the network.

  7. Well done, thanks!

  8. If you’re getting that invalid drive E:\ warning while trying to load new programs, simply plug in a jump drive & use admin tools to rename it to “E:\” drive & leave it in while you download one file & it will correct the path.

  9. Thank you so much. What a pain this was. I was just doing a shift-right-click and runas local admin account to resolve.

  10. Thank you Rick. All I had to do was put the Flash Drive in and it became Drive E: and problems were solved!!! The program installed flawlessly.

  11. My problem was “Cause 3” – you rock. Thanks for taking the time to figure this out and posting it.

  12. Thanks for this,

    we used to edit registry to get around this, but this is much easier!

    Anyone had any issues deploying via sccm and getting the same error in event log? Can’t see a way around that :/

  13. Here is helpful solution

    The simple and quick resolutions to repair 1327 error are outlined below:

    Enter Valid Path of My Documents in your Registry
    Make Required Changes
    Restore the Original Drive Letter
    Temporarily Map a Folder to the Drive Letter

    Taken from:

  14. Anthony Avatar

    Thanks for the tip! Quick question. If the fix is only temporary does that mean the error will happen again the next time a program or update tries to install?

    If so, and if the fix doesn’t affect the ability to use the drive, why not add it to a batch file that runs on startup?

  15. Robert Avatar

    Hey Anthony,

    For me, this only happens once or twice while installing programs on a computer during initial setup, and I’ve never had an update have an issue. So, adding it to a startup batch file wouldn’t be helpful to me.

  16. Thank you for the solution

  17. Efrain Avatar

    You don’t know how much your post helped me.

    Thank you SO much!

  18. Many thanks, this was driving me crazy.

  19. Thank you for this gem of information!!

  20. Thank you so much, this was really useful, fixed it straight away! All I need to do now is work out how to install it across the network! 😛

  21. Samir Avatar

    Perfect! This worked like a charm… Thank you so much…

  22. Finally – someone with a real solution to this error. Thank you!

  23. Please be sure to add /persistent:yes to teh end of the command for each drive so you dont have to re-enter on reboot. Thanks

  24.  Avatar

    Thank you!!!!!!!!!!!!!!!!!!!

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.