CD/DVD dropped after Hyper-V role installed

Hi,
yesterday I installed server 2012 from the scratch (quite normally from a DVD). All went OK and CD/DVD drive was present after OS restart. Today I installed Hyper-V role on same machine. After reboot DVD drive was vanished from Windows Explorer. It didn't
show in the Device manager either. I checked registry HKLM\System\CurrentControlSet\services\atapi from SRV2012 and SRV2008R2 machines just to compare them.
It appears that there is one more line (key) in the Hyper-V machine (running srv2012) registry: the"Owners" key, which is missing in the srv2008 machine not running Hyper-V. I don't have a clue what that means and if that has anything to do with
the issue.
So, my question is: Where has my dvd drive gone after Hyper-V role installation and how can I get it back?
Can anyone show me the path forward with this problem?
Jussi

Hi ,
Is there relevant event log in "hardware events" (Event Viewer -->applications and services logs -->Hardware Events) ?
Any other relevant error messege after you installed Hyper-v in the Event Viewer ,please post it here if possible.
Best Regards
Elton Ji
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are trying to better understand customer views on social support experience, so your participation in this
interview project would be greatly appreciated if you have time.
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We
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