Install error 1327 | "Invalid Drive" | CS4, CS5, Acrobat, Reader

When you install or update a CS4 or CS5 product, Acrobat, or Adobe Reader on Windows, you receive the following error:

Error 1327.Invalid Drive: [drive letter].

Try the following solutions to fix the problem.

Determine the letter of the invalid drive that is causing the installation failure. For CS4 or CS5 installations, the drive letter appears in the install log following the error 1327 code. For Acrobat or Adobe Reader installations, the drive letter appears in the error window.

For more assistance finding the error in Creative Suite 4 installations, see Troubleshoot installation with install logs | CS3, CS4.
For more assistance finding the error in Creative Suite 5 installations, see Troubleshoot CS5 installation with install logs.

Choose Start > All Programs > Accessories, right-click on Command Prompt, and choose Run As Administrator.

Type subst Z: "C:\Windows" and press Enter.

Note: The example above shows the letter Z as the drive letter. When you type, replace the Z with the letter of the invalid drive from your install error or log.

Reinstall your Adobe product.

Go to the Microsoft support page http://support.microsoft.com/kb/886549.

Scroll down to the Fix It For Me section.

Click the Microsoft Fix It button.

Reinstall your Adobe product.

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Install error 1327 | "Invalid Drive" | CS4, CS5, Acrobat, Reader | Windows

Products Affected

Issue

Solutions

Solution 1: Temporarily remap the invalid drive.

Solution 2: Run the Fix It solution on the Microsoft support website.

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