Failure Resolution: This behavior can often occur for 2 reasons:
A. The system appears after some anti-virus software has been installed. Part of the anti-virus software real-time monitoring functions, when access to the existence of large volumes of compressed packets or ISO files of the directory, will automatically extract these files for scanning, for some poor configuration of the host, will lead to slow speed. It is recommended to set antivirus software on your own and turn off this feature.
B. There are no anti-virus software installed. XP has a feature that automatically extracts multimedia file information and makes it a preview. , XP will automatically scan and read information about these files and display the first screen of their thumbnails or videos. If you have a large number of folders or a large volume or high compression rate of video files (especially dvdrip,rmvb), this process to invoke the decompression program, for the configuration of the lower host, easy to make the system running very much lower, serious will also cause the crash
Workaround: Preview files for video files in Windows 2000/xp "Shmedia.dll" plays a decisive role in canceling the video preview of the system: Click start → run, and enter the "regsvr32/u shmedia.dll" command in the Open Run dialog box, " OK will pop up a successful dialog box and then "OK". In the future, if you want to turn on the video preview feature again, just enter the "regsvr32 shmedia.dll" command in the "Run" dialog box again.
Close Picture preview: Open Registry Editor, locate and delete [HKEY_CLASSES_ROOT Systemfileassociationsimage