Weird icon change

hi all

 

Just wondering, i installed NAV 2010 on three workstations in my office, this morning one of my stations icon changed to a weird "atom" type icon,the other two seem normal with the "doctors stethoscope" icon, im freaking out as this affected workstation has the accounting software on it, i did scan with nav+malware antimalware bytes,no threats..

 

im hoping this is not malware/virus?

 

 

thanks for your time

 

cheers