When you start to install, you get error 1327, which references an invalid drive number.
The System Registry may be erroneously pointing to a temp drive.
Back up your Registry.
Select Start> Run> and then type Regedit.
Navigate to the following folder:
HKEY_CURRENT_USER\Software\Microsoft\Windows| CurrentVersion\ Explorer\User Shell
In the right panel, search for entries that list the incorrect drive.
Modify the incorrect drive to point to C:\.