Under some circumstances KKBOX may be blocked by your anti-virus/ internet security software.
If you are having trouble running KKBOX normally, find and add the "KKBOX.exe" to the exception list and see if the problem is solved.

To find out more on how to add programs/files to the exception list, refer to the instructions provided by your anti-virus/ internet security software companies.
You can also click on the names of the companies below and it will take you to their support page.

Avast Antivirus
AVG
Avira
Bitdefender
G Data
Kaspersky Lab
Intel Security (McAfee)
Trend Micro (PC-cillin)
Windows Defender