# Class Not Registered Error No. 80040154 - DVD player problem

**URL:** <https://boards.straightdope.com/t/class-not-registered-error-no-80040154-dvd-player-problem/235698>\
**Category:** Factual Questions\
**Created:** [March 22, 2004, 6:17am UTC](https://boards.straightdope.com/t/class-not-registered-error-no-80040154-dvd-player-problem/235698 "2004-03-22T06:17:57Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Travelin\_Man](https://avatars.discourse-cdn.com/v4/letter/t/f0a364/32.png) [@Travelin\_Man](https://boards.straightdope.com/u/Travelin_Man)\
**Post date:** [March 22, 2004, 6:17am UTC](https://boards.straightdope.com/t/class-not-registered-error-no-80040154-dvd-player-problem/235698/1 "2004-03-22T06:17:57Z")

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I should probably preface this question by saying that I am not that great with computers. I probably know more than average, but I am certainly not an expert. Please dumb down all responses accordingly. 🙂

Now, I use DVD X Player, a region free software DVD player. I have been using it for a long time without any problems, but just yesterday it started giving me the error message “Class Not Registered. Error No. 80040154” each time I try to play a disc. It does not give me any explanation on how to fix the problem. I also have no idea why the problem suddenly came up because I have not made any changes to my computer. Does anyone have an idea what the problem could be? I am using Windows 98 if that helps. Thanks!

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**Author:** ![Dog80](https://avatars.discourse-cdn.com/v4/letter/d/6bbea6/32.png) [@Dog80](https://boards.straightdope.com/u/Dog80)\
**Post date:** [March 22, 2004, 2:31pm UTC](https://boards.straightdope.com/t/class-not-registered-error-no-80040154-dvd-player-problem/235698/2 "2004-03-22T14:31:57Z")

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go to My Computer and right click on your DVD icon. Choose Properties. There must be a box called “DMA” or something like that. It must be checked, or else you can’t play dvds.

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**Author:** ![Rex\_Fenestrarum](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/rex_fenestrarum/32/7265_2.png) [@Rex\_Fenestrarum](https://boards.straightdope.com/u/Rex_Fenestrarum)\
**Post date:** [March 22, 2004, 8:09pm UTC](https://boards.straightdope.com/t/class-not-registered-error-no-80040154-dvd-player-problem/235698/3 "2004-03-22T20:09:45Z")

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DMA doesn’t enter into it. Theres something wrong with the app. But other than uninstalling\reinstalling, I can’t offer any more help. In fact, given how uptight this board is about legal issues, I’m surprised that this hasn’t been locked yet - even though there’s nothing illegal about “region-free” players. See if any of these links help:

[http://groups.google.com/groups?sourceid=navclient&ie=UTF-8&oe=UTF-8&q=Class+Not+Registered.+Error+No.+80040154](http://groups.google.com/groups?sourceid=navclient&ie=UTF-8&oe=UTF-8&q=Class+Not+Registered%2E+Error+No%2E+80040154)

Looks like a DirectX\Windows Media Player issue (yes, I know you’re not using WMP, but your app might be)