It is best to disable autoplay, otherwise it is likely to run some viruses, Trojans, etc. Disable method:

Click Start-Run-Enter "gpedit.msc" to confirm-Double-click the computer configuration on the right-Manage templates-System-There is a "Turn off autoplay" below. Double-click it and then enable it. Enabled, closed.

Then click User Configuration-Manage Templates-System like the previous one to enable "Turn off autoplay".

Ok, there will be no auto-play dialog box when inserting USB flash drive and CD. . .

The AutoPlay dialog box lets you choose which one to run. Although it is played automatically, it is not as advanced as that. Once you insert the USB flash drive, you will run the file. . .