actual fix is posted on Microsoft website, Autorun has been disabled for security purposes usually during a system update, to enable the autorun temporarily do the following fix. It requires a Registry edit, so before making the alterations backup the specific key by exporting to a "reg" file in a directory easy to find.
I don't know if you've solved your problem, but I recently had this problem as well... I searched the internet like crazy, and when I came up with no results, I decided to search through the registry.
I found a registry entry that was causing the problem:
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\IniFileMapping\Autorun.inf]
With a value of:
@="@SYS
oesNotExist"
You can double click on the backed up "blank_.reg" file as soon as you finish the install to restore the security settings.