NIS 2012 funny icon

Hi,

 

I am using Windows 8 Pro and NIS 2012.

 

I noticed something wierd on my NIS icon.

 

 

This is second time that I noticed that. Usually reboot fix that but what may cause that? Virus? I have scanned my computer Malware Antibytes and also NIS 2012 and both didn't find anything.

 

Edit.

After this post icon got normal.