Acronis True Image for Western Digital

After attaching my WD My Passport External Drive to my computer, I installed Acronis True Image for Western Digital in my computer.
However when I tried to run this software for baking up my files, I received the following warning :-
“You have to reboot your computer before running Acronis True Image.”.
After I received the above warning, I restarted my computer twice and shut down and turned on my computer twice but I still received the above warning.
Can anyone help me and advise me how to solve this problem?
Thank you in advance.

EYu

Hello,

Please refer to the following KBA article: http://support-en.wd.com/app/answers/detail/a_id/15564/