I've had to bypass the inability to write or read from my CD drive. Open up notepad and type in "start regedit" without quotes. Save it AS a .bat file. Double click it, should open up registry editor. Go to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Uninstall If there's anything that says NoAddFrom... Then double click it and change the value to 0.