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When using a Desktop or Laptop running Windows, files currently in use usually cannot be deleted. If you're listening to an MP3 in the Windows Media Player or WinAMP, and you attempt to manually delete that file in Windows Explorer, you'll get an error message. Programs accessing a file you're attempting to erase must be shut down - or their usage of the file targeted for deletion must be terminated - before you can delete it. The same is true of your Pocket PC.
原帖地�: TechSpott - Computer and technology forums http://www.techspott.com//showthread.php?p=1079
People often attempt to delete a photograph, a note or an audio file from their Pocket PC or storage card, only to be met by an error message such as "Sharing Violation" or "Problem Deleting..." This is caused when the file you are attempting to delete is still in use. The screen below appeared when we attempted to delete an MP3 audio file called "Vast - Touched." Turns out that the file was in use in Windows Media Player Mobile somewhere in the background.
Unlike Windows, the Pocket PC operating system does not actually shut down (by default) an application when you tap the "X" in the upper right-hand corner of the screen. Tapping the "X" clears the program from the screen, but keeps the application - more often than not - active in memory. So, a program you used earlier in the day that was accessing a file you now wish to delete may still be running in the background, keeping the file from being deleted.
There are two ways to resolve this problem. The first (and easiest) solution is to perform a soft reset of your Pocket PC by pressing the recessed reset button located on the rear or bottom of the device; this will clear all active programs and "reboot" the Pocket PC. The second solution is to manually force the Pocket PC to quit the program currently using the file you wish to delete. This may be a more attractive solution if you don't want to close everything, just the offending application.
To force a stop, from the "Today Screen" tap Start > Settings. Select the "System" tab in the Settings menu and then select "Memory." In the "Memory" menu, select the "Running Programs" tab. Once you've reached the "Running Programs" utility, you can manually stop any running program, or stop all running programs at once. Since, in this example, the file we're looking to delete is an audio file being accessed by Windows Media Player Mobile, we selected "Windows Media" and tapped the "Stop" button.