Share '"File Loading - Security Concern" message'

After the reinstalling of OS (WIN 7 64 bit ultimate), AutoCAD 2014 64 bit sp1 and nXt 318b I put the nXt to be loaded during the start of AutoCAD into applications startup briefcase. But now, each time I start ACAD, alert window pops up (see attached) 3 or 4 times and I have to confirm 3-4 times to load it. How can I get rid of that? Never had that problem in the past. Thanks in advance for any i…