TechNote

Error 1327.Invalid Drive: [drive letter] while installing or updating Adobe CS4, Acrobat or Adobe Reader

Issue

During installation or updating (patching) Adobe CS4, Acrobat or Adobe Reader you get an error window that says: "Error 1327.Invalid Drive: [drive letter]" where drive letter is a hard disk like F: or H:.

Reason

You are using folder redirection and the mapped drive no longer exists or you are not connected to the network it is mapped to.

Solution

Important: Adobe does not support modifying the registry, which contains critical system and application information. Make sure to back up the registry before modifying it. For more information about the registry, refer to your Windows documentation or contact Microsoft.

Choose Start > Run.
In the Open box type Regedit and click OK.
Browse to the following keys:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders
Verify the drive, path, or variables are valid for each of the keys.
For each of these keys on the right hand side there is a Data column. Each entry that refers to a variable or a path name - each value needs to refer to a valid drive, path or variable. These path names may be unique to your individual PC - to restore the defaults it may be necessary to examine a known working machine, or contact a Microsoft Windows technician for additional help.