When an ATC device is plugged into a desktop PC, some windows may automatically appear. These popup windows are typically one or more of the following:

Auto Play Window: States "This disk or device contains more than one type of Content. What do you want Windows to do?" or States "Windows can perform the same action each time you insert a disk or connect a device with this kind of file: Music Files. What do you want Windows to do?"
In this case choose "Take No Action" ,cancel or simply press the red X to close the window.
Disc Scan Window: States "Do you want to scan and fix (x-drive letter)?

In this case choose "Continue without scanning"
Format Disk Window: States "You need to format the disk in drive X(drive letter): before you can use it. Do you want to format it?

In this case choose "Cancel or press the red X to close the window.
*Please Note that the windows displayed on your PC may not be exactly like the above examples but would be closed in a similar manner.