“Invalid Drive” During Installation

The error message Invalid drive X: may occur during installation if you have outdated or wrong path details somewhere in your Windows registry.

There are several methods to work around that issue.

1. Create a new Windows user temporarily. Install the software with that user’s credentials (for all users). Remove this user and start the software.
2. Open an administrative console and substitute the drive:
   • Windows Vista/7: Select “Start (= Windows logo) => All programs => Accessories” => rightclick “Command Prompt” and select “Run as Administrator” from the context menu.
   • Windows 8 and higher: Rightclick into the bottom left corner of the desktop and select “Command Prompt (Admin)” from the context menu.
   • Windows XP: Login to Windows with the “Administrator” account. Select “Start => All Programs => Accessories => Command Prompt”.
   • Create a folder, e. g.:

     mkdir c:\paragon

   • Enter the following command (where X: is to be replaced by the letter the error message refers to):

     subst X: "c:\paragon"

   • Perform the installation. The substitution will be vanished when the PC is rebooted next time.

KnowHow: Installation
Tags: drive, invalid

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