Why can't my computer play DVDs anymore?

It has a DVD drive and it used to be able to too.

RealPlayer says: Key exchange for DVD copy protection failed.

Windows Media Player says: Open Display in Control Panel, and then lower your screen resolution and color quality settings. Which settings though?

Why can't my computer play DVDs anymore?free adware remover

ryt click ur desktop go to properties .. settings ... set it to 16 bit see if it makes a difference ... if u need another dvd player try this one ...

http://www.avsmedia.com/DVDPlayer/downlo...

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Why can't my computer play DVDs anymore?internet security 2006

Try installing Cyberlink Power DVD

If it doesn't work try installing codecs.