When you play a media file on your computer (such as .mpg, .wmv, .avi, and .asf).WMP tracks what video and audio files you’ve opened.It helps to improve the performance the next time the file is opened.

When you are downloading a large video from a website.In the midst of downloading you can play the video .Windows Media Player (WMP) stores certain information (about the clip,length) still the portion of video you have watched. The next time you attempt to view the video, the video will play only to the point where you stopped the download process because that portion of the video is all the cache file thinks the video file consists of.

Here is the Answer to reset the Windows Media Player (WMP) cache.

1. Go to your Windows Folder
2. Navigate to C:\documents and settings\all users\application data\microsoft\media index (Windows 2000 or XP only)
3. Navigate to C:\documents and settings\all users\application data\microsoft\media index) (Windows Me or 98 only)
4. Delete the wmplibrary_v_0_12.db file.

The next time when WMP creates a cache .A script can be used to delete each time windows starts or or set the cache file attribute to Read Only by opening My Computer, navigating to the cache file, right-clicking the filename, selecting Properties from the context menu, and selecting the Read Only check box.

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