When i had windows vista home premium i never had problems playing dvds now that i installed windows 7 my ? -

computer is not detecting when i put dvd in the dvd player

Being that Windows 7 is in Beta form, this may be an issue with it. But first i d try re-installing the driver for your DVD player to see if this corrects the problem. Also, here is a site that has a lot of discussion on this software: http://windows7forums.com/

It may be a preview version of Windows 7 that can be downloaded via the web or torrents. Wait for the full version of Windows 7... or downgrade back to Windows Vista.