Windows Media Player cannot play the file because there is a problem with your sound device. There might not be a sound device installed on your computer, it might be in use by another program, or it might not be functioning properly.

Update the media player to the newest version.
When media players go through upgrades, new codecs are often added to the player along with new features.
These new codecs give the player an ability to play videos in additional formats.
Download and install a codec pack for your computer-based media player from a codec website, like Free-Codecs.

See Below
http://www.free-codecs.com/download/k_lite_codec_pack.htm
The K-Lite Codec Pack, for instance, contains multiple codecs and works with multiple media players, which gives all of the media players that are installed on your system the capability to play any video file that uses those codecs.
Once you download a codec pack, go to the "Downloads" folder on your computer, right-click the codec pack and choose "Extract All" to extract the codecs and move the codecs into a folder on your "C:" drive.
The codecs integrate into your computer-based media players automatically.


Get a new player. If you have updated your player and installed all of the available codecs, and video still won't play in the player, the player may just not have the necessary components to play your video files.
Download and install a new player, such as Winamp or the VLC Player, to your system.
http://www.real.com/realplayer

http://download.cnet.com/Winamp/3000-2141_4-10251792.html
http://www.videolan.org/vlc/
Personal Media Players
Find out which video formats your media player accepts.
This information should be provided in the user's guide that came with your player. iPod, for instance, accepts video only in the M4V, MP4 and MOV formats, according to the Apple website.


Convert the video file to a format supported by your personal media player in an online conversion system.
Some online systems that can make video conversions include Movavi Online Convert and YouConvertIt.


Remove the original video file from the media player using the player's software, such as iTunes for iPod devices.
Then, add the new video file to the software library and drag the new file to the device.
Once the video is in the correct format, the codecs in the media player should read the converted video file.

Close all apps you are not using, video playback needs the full attention of the CPU and RAM.
Go to app store and install VLC player. Play your videos with that. VLC is also an EXCELENT media player for your PC or laptop. It plays EVERY video codec, and I mean EVERY video file that has ever been invented :-)

have you tred upgrading the software it uses

You should use sth like Salling Media to sync your Android device with your iTunes Library. Find it here: http://www.salling.com/MediaSync/windows/

You will need a media player installed on your android device if you havent already got one. You will then need to put movies into a format your device can read, this will possibly depend on the media players capabilities as well.

There is a good list of media players here: http://savedelete.com/10-free-android-media-player-apps-you-should-have.html

And an excellent tool for converting videos here: http://www.handbrake.fr

Thanks

iTunes song have DRM protection, you have to remove DRM from iTunes and convert M4a to MP3.

Are you using Windows Media Player to play the file? If so, right click the window, select "enhancements", and you'll see "graphic equalizer" there.

There are supposedly ways to do it, but they require using TCPMP like you said. I will post the exact instructions below. Windows CE is actually what is used on PDA's and Phones and isnt ideal for a mini laptop or netbook. Do you use your netbook for mainly light stuff like internet and word processing? I would suggest going with a Linux OS like Ubuntu, it runs very fast on light resources and you can load everything you need, and for free. Here are the instructions for TCPMP if you want to try it again:

1

Download TCPMP on your Windows CE browser (see link in Resources section).

2

Double-click the file once the download has finished to begin installing the media player to your Windows CE device. If prompted for an installation directory, click "Main Memory."

3

Download FlashVideoBundle (see link in Resources section), then double-click the file to install it. Choose the same location to install this file.

4

Turn your Windows CE device on and off. Click "Start," then "Programs." Click "Video Sites" to load up a list of compatible video sites (including YouTube). Click "TCPMP" to load the settings for your player. Change any of the settings to your personal preference, then click "OK."

5

Watch YouTube videos on your Windows CE device as you normally would on a full version of windows.

AVS DVD Player is a free universal player that I put on all Acer Ones that I sell. It is an excellent player, that can go full screen and handle every format. It will even play VOB files which are dvd files "ripped" from dvd discs. I have never had a failure with this program....

http://www.brothersoft.com/avs-dvd-player-free-44678.html

Sound issue can be related to driver, sound settings or hardware itself. If you tell me more about the issue an I will give you step by step solution.
Check if device manager shows the Sound device? When you play a media file does it indicates any error message? Have you unmuted all the channels?
I will look forward your follow post