Windows 7 Autoplay completely disabled - how to re-enable?
Control Panel -> Programs -> Default Programs -> Change AutoPlay settings,
Adjust as required.
From http://www.sevenforums.com/tutorials/27544-autoplay-enable-disable-autorun.html
Method 1:
1. Go to Control Panel\Hardware and Sound\AutoPlay.
To Enable:
At the top, check Use Autoplay for all devices and Click Save.
To Disable:
Uncheck Use Autoplay for all devices and Click Save.
Method 2:
1. Click Start and in the Search box, type gpedit.msc and press Enter.
Now browse to Computer Configuration\ Administrative Templates\ Windows Components\ Autoplay Policies\ Turn off Autoplay.
To Enable:
Change the value of Turn off Autoplay to disabled.
To Disable:
Change the value of Turn off Autoplay to enabled.