Error 1327 refers to an invalid media or invalid drive.
"Error: 1327 Invalid Drive: drive:\" references a drive that may or may not exist on your computer.
Possible causes of this error are:
• Invalid Drive Letter (Destination): An invalid drive letter has been hard-coded into the Destination field of a feature or component.
• Invalid Drive Letter (INSTALLDIR): An invalid drive letter has been hard-coded into the value of INSTALLDIR under the Product Properties section in the General Information view.
• Invalid Drive Letter (Property and Directory tables): A property listed in both the Property table and Directory table has been assigned an invalid drive letter in the Property Manager.
• Changed Registry Values: The Windows Installer has defined some of its own properties, such as the MyPictures Folder property. At runtime, the Window Installer resolves this property to the location of the My Pictures folder for the current user. The registry values used to resolve these predefined properties are located under HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders. One of these values may have been changed to a network drive letter or nonexistant drive letter.
• Unavailable Network Connection: A network drive is referenced in the MSI package and the network connection for that drive is not available at installation time.
To resolve this error:
In the Start menu, go to the Windows Administration Tools, open Registry Editor (regedit), and run as an administrator (if you are not already one). Check on the following drives that the filepaths to all contents reference as a usable and writable drive:
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
There may be some that say something like '%USERPROFILE%\Documents', etc. If you open up a file browser window and put '%USERPROFILE%' in the filepath, make sure it again references a drive that is usable and writable.
If anything needs to be changed, right-click the name and select Modify. Change the file path to one of a writable drive. Installation should now succeed.
For more information, see this site. 