What happens when I can't disable the Universal Volume?

When I need to remove the mobile hard disk or flash memory, we usually perform the “Safely Remove Hardware” operation, but often encounter “cannot disable the universal volume”. The prompts make the user afraid to pull out the USB connection.
There are several reasons for this prompt. The reason often mentioned in the online tutorial is to open a file on the mobile hard disk and it is in use. If this is the case, close the relevant program. But many times, we have closed all the applications, but still see this prompt.
Some people have introduced two solutions: one is to end the explorer.exe process, and the other is to log out the current user. Admittedly, both methods are effective, but they do not explain the cause of the problem, and the solution process is more troublesome.
In fact, this prompt appears, mostly because the resource manager scans the media file information on the pre-read mobile hard disk in the background, such as AVI, MP3, and so on. This kind of media file information scanning function often seriously affects the system speed, resulting in unsmooth operation. As long as you cancel the pre-reading, you can solve the problem.
Cancel the pre-reading method:
In the "Run” box, type: regsvr32 /u shmedia.dll, you can cancel the pre-reading function.
Cause analysis: The shmedia.dll file provided in Microsoft's system is a convenient and useful feature. With it, when you view media files in Explorer, you don't need other special tools or players, you can see the playback-related information of the file, such as resolution, playback duration, data rate. And even musician information and so on. After shaudi.dll is logged out, this information is not visible in the Explorer. Disabling it is sacrificing one feature and getting another convenience. Users can decide for themselves how to choose.
A few users found that sometimes they can't pop up without media files, only restart the computer. This kind of situation that can't be popped up is not much. The more common reason is that the virus is in the system, or the anti-virus software scans the zip or rar compressed package in the background.