why wont my pc play some dvds, but will play others?
925548
some of the dvd's like sony and paramount now put copy protection on there disks so that they only play in dvd players and not on computer dvd drive. you can bypass this by using anydvd. it is a downloadable software you can try for 30 days and if you like it you can buy it. i just bought it because i was sick and tired of not being able to use my dvd's on my computer. hope this helps.
368274
If there is already a built in DVD drive, you only need an appropiate Player to play DVDs. I would suggest the Real Player, you can get it for free from http://www.real.com\n\nYou can see what type of CD/DVD you have. Right click on My Computer / Properties / Hardware / Device Manager / click on the + sign beside DVD/CD-Rom Drive and it will show up.
1124245
You will need to purchase a DVD drive for your computer to play DVDs.  It is not possible to play a DVD out of a CD Drive.  your best bet is to purchase a DVD drive or a DVD burner from tigerdirect.com or newegg.com for under $40, install it and then you will be able to watch DVDs
331087
Not all DVD players support dvd+r. Statistically is is a slightly more incompatible format.
499065
You answered your own question you said CD drive, it is not a DVD drive therefore cannot play DVDs\n\nhttp://www.newegg.com/Product/Product.asp?Item=N82E16827136088
641919
Check for DVD Burner or if it is a Codec go to microsoft, do searches and try installing ones that you may need.
116417
You must be trying DVDs in your CD Rom or VCDs in your DVD player. Your information is not complete.\n\nIt only happens when your computer cannot read the format.
112188
There may be something up with the laser on your DVD drive, which would suggest a hardware fault perhaps.  Im not too sure about software stuff but there may be settings that are causing it to stop prematurely. Check that all your DVDs are clean and that the bay itself is fee from dust etc...
697686
You may need to reset some dll files. Follow the instructions on the Microsoft link below if your system problem occurs when trying to play a CD or a DVD:\nhttp://support.microsoft.com/?kbid=899873
141327
If you're trying to play a movie dvd or cd, make sure that a dvd decoder is installed. This costs money. That may not be the problem though. Check for updated drivers also.
206853
Well, this could be a dvd driver problem.\n\nIf you're using Windows XP try to restore the systema on a point check date when you didn't have this problem ...this will solve your problem, or reinstall the Windows OS in an UPDGRADE/RESTORE mode.
939409
Clean the drive using a cleaning CD. In most the cases such problems are caused by moisture or dust on the readind lens. Make sure that you run the cleaning CD multiple times. \n\nAs you said that other HDD video files perfectly there is nothing wring with the software which runs it or the codec associated with it. \n\nAlso make sure that it is not a problem with the DVD Disc.
829905
plays colour and black and white dvd's
358353
No, it can only play DVD's, it can burn CD's. It has to say DVD-RW or DVD+RW
86185
it sounds like the DVD burning software you had before has not yet been re-installed.\n\nInstall a DVD Burning program, then try it.
57192
Save it as a movie (avi) file, and if your dvd can play avi files you should have solved the problem\n\nif your dvd cant play avi files, save it as mpeg and use a cd burning software to make a VCD that most dvd players can play.
1029244
It may be because it does not support those types of Cd's. I have seen where some players will not play burnt Cd's from computers. I don't know why?? but they are just not compatible and wont play.