I think that was just a coincidence, the inability to play DVD's is another issue.
You can try this, go into Windows Explorer, then right click on your DVD drive and choose properties. Then click on the autoplay tab, under the content type select DVD movie, then select the software that came with the machine (media bar?).
Make sure the action to perform is checked, then hit apply, then OK.
If the software is functioning properly when a DVD is inserted it should begin to play.
If it doesn't, possibly there is a problem with your software, if you are running XP do the proceedure mentioned above, only this time select Windows Media Player.
If it plays with Media Player then the problem lies in your software, uninstall it then reinstall it and see if that corrects it.