Install Error 1327 'Invalid Drive X'

Symptoms

Setup says 'Invalid Drive X' for some drive letter that is not C.

Likely cause

User Shell Folders registry values reference a drive that no longer exists (e.g. an old network drive H:).

Fix

1. Win+R > regedit. 2. Go to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders. 3. Find any value whose data starts with a drive other than C: and edit it back to C:\. 4. Retry install. References: support.microsoft.com/kb/327763, error1327.net.

Sourced from militarycac.com. Rewritten for clarity.

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