FIX: Error 1327 Invalid Drive blocks program installation

Ivan Jenic
by Ivan Jenic
Troubleshooting Expert
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  • Invalid Drive errors usually appear when trying to install some software. This could happen because the drive is not available anymore or a system setting is wrongly configured.
  • Error 1327 can be fixed by reconnecting the missing drive if possible. Otherwise, check one of the solutions presented and follow the instructions.
  • If you like to solve any issues with the installer, check out the Windows Installer Errors Hub for articles that solve those problems.
  • Fixing errors is our specialty. We scour the web to find even the strangest error reports and solve them in the Windows 10 Errors section.
fix Error 1327 Invalid Drive Windows 10

Steps to fix Error 1327 Invalid Drive

  1. Remove drive letter with Command Prompt
  2. Reinstall the program
  3. Disconnect network drive
  4. Reassociate the drive letter with a temporary location
  5. Create a new user account

If Error 1327 appears when you try to install a certain program or software, telling you that you have invalid Drive: P:/ (or maybe some other letter), you’ve come to the right place. In this article, you’ll find some solutions for this error, and you’ll be able to install your programs normally.
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This error code may come under different forms and it affects various programs. So, users may encounter one of the following error 1327 variations:

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  • Error 1327 invalid drive H :
  • Error 1327 invalid drive U:
  • Error 1327 invalid drive E:

These tools seem to be affect by error 1327 more often than others:

  • Autocad
  • Adobe
  • Arcgis
  • Kaspersky
  • Epic Games
  • Minecraft
  • Hamachi

Why does error 1327 Invalid Drive occur in the first place?

This problem might occur if the system folder is mapped that has the Reconnect at Logon check box checked, or you accidentally changed the drive letter of some of yours CD or DVD drives. This might prevent some programs, like Adobe Photoshop or Microsoft Office from installing. So, here’s what you should do to resolve this.

How do I fix error 1327 invalid drive in Windows 10?

Solution 1: Remove drive letter with Command Prompt

The command you’ll perform will allow you to connect and disconnect drive letter to a virtual location. Disconnecting a letter should allow your program to install without generating an error message. So, here’s what you need to do:

  1. Go to Search, type cmd and open Command Prompt
  2. In the Command Prompt, type the following line and press Enter:
    • subst /P (Driver Letter)
  3. Close Command Prompt and try to install your program

Solution 2: Reinstall the program

If this errors occurs when you are trying to install a software that was previously removed then some of the leftover of the old program might create a conflict.

What you should to is make sure to completely clean the system from old or unused software. There are specialised tools to scan every part and detect and remove leftovers.

We recommend IOBit Uninstaller as a safe solution for this.

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Solution 3: Disconnect network drive

This solution will work only if a network drive appears in This PC, otherwise stick with the previous solution. Follow these steps to disconnect the network drive in order to eliminate error 1327:

  1. Go to Search, type file explorer and open File Explorer
  2. Go to This PC
  3. Press ctrl + F1 in order to open ribbon with tools
  4. Under Map networking drive go to Disconnect network drive
  5. Try to install your program again

Solution 4: Reassociate the drive letter with a temporary location

This method allows you to link a drive letter to a virtual drive location. In this manner, the installer will locate the respective temporary path and use it to install the problematic software.

Note: If the temporary path doesn’t exist, you need to create it.

  1. Launch Command Prompt as an administrator
  2. Enter subst [Driver Letter]: C:temp > hit Enter
    Close Command Prompt > reinstall the software.
  3. Launch Command Prompt again and enter the command: subst /D [Driver Letter]: to remove the software’s association with the temporary path > hit Enter.

Solution 5: Create a new user account

You can also try to sign in to another user account and see if the error still occurs. If you don’t have a secondary user account on your machine, you need to create a new account.

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Did some of these fixes work for you? Tell us more about your experience with this issue in the comments. We’d like to learn more about it and maybe provide you with some additional solutions if the above-mentioned methods weren’t enough.

FAQ: Learn more about Error 1327 Invalid Drive error

  • How do I fix an invalid drive?

An invalid drive could have multiple causes: the network drive is unavailable or was removed. The hard drive is damaged and needs to be replaced. Or the software is not configured as it should. Each cause has a different fix.

  • How do I change a drive letter?

To change a letter for a drive open Disk Management with administrator permission. Then right click the drive and from the options choose Change Drive Letter and Paths. Be careful when making this change as other programs might stop working.

  • How do I access disk management?

The quickest way is to press Windows+R and type diskmgmt.msc in the Run box and hit Enter or click OK. This will open Disk Management window. If it’s not working, use this guide.

Editor’s Note: This post was originally published in June 2015 and has been since revamped and updated in May 2020 for freshness, accuracy, and comprehensiveness.

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