The video file you try to open might not be a proper video/audio format

MOV is a common multimedia format often used for saving movies and other video files; uses a proprietary compression algorithm developed by Apple Computer; compatible with both Macintosh and Windows platforms.
To play a MOV file, use this player
http://movplayer.net/

It is an problem with your audio codec or video file. Download a codec pack and install it. It help to remove some codec errors. All in one codec pack help to you. To download please visit filehippo.com

Update your Photo Gallery click on this link http://explore.live.com/windows-live-photo-gallery?os=other
Once you have the file run it then select those program that you need by putting a check mark on the items.

This is a type of video that can be played on your computer and portable media players. The most important feature of a WMV file is that its format allows large video files to be compressed, retaining the rich quality of the video. It is a file format developed to store video content in a compressed format, so that movies and other video programs can be viewed on a personal computer. These videos can be watched from the hard drive of your computer, or other media players. To play a WMV file, a set of codecs are required. A codec is a program that can easily read a file, creating video and audio formats from the provided data. WMV files may be played on Microsoft Windows Media Player and other media players as well. The latest version of WMV is WMV10.

If you insist on using the GOM Player, you have to install the codec from http://www.free-codecs.com/index.htm,

Suggestion,
Install the "K-Lite Mega Codec Pack" or "K-Lite Codec Pack" to your PC/Laptop.

Alternatively you can install Free media players like VLC Media Player Or MPCStar Player which will play most of the Audio/video formats.

To play .mkv file. Use gom or vlc player with klite codec installed

Try reinstalling quicktime. Go on control panel uninstall quicktime. Then go to this url:http://www.apple.com/quicktime/download/win.html
Download it again. And install it again. Itunes should now work.

If it doesn't, for Video problems: Open QuickTime Player and go to 'Edit' -> 'Preferences' -> 'QuickTime Preferences' -> 'File Types' -- check here to see if the file format of your problem video files is selected.

For Audio problems: Open QuickTime Player and go to 'Edit' -> 'Preferences' -> 'QuickTime Preferences' -> 'Audio' -- Here you will see a Device is needed that will play your sound. Select 'Audio Playback and Recording Devices', If you are having an Audio problem it may be due to having no device or an improper device.

Good Luck

Hi,

The pdf files can only be opened with the adobe reader 8 or 9.

To download the adobe read please click on the below link:

http://get.adobe.com/reader/

It is likely that the files are encoded with DIVX, you can download the Divx plugin for windows Media playere here.
http://www.divx.com/divx/windows/

watch your options on the install to avoid those pesky toolbars