Tamper Monitor locks out my LabView (graphical programming tool) App for up to 5 seconds?

Why does Symantec End Point Protection Tamper Monitor lock out my LabView App for up to 5 seconds?

 

I am running a multi threaded application where each thread is assigned to a different core on a 4-core PC running XPPro. The program uses many queues to communicate between the various threads. The application makes extensive use of the Vision Development software, including real time acquisition from multiple GigE cameras. Software is LabView 2009, Vision 2010 and VAS 2010 and Windows XPPro. We use serial communication and write TXT files to disk. We do not access the Internet.

 

Our customer runs Symantec End Point Protection (corporate version of the Norton AV software) V11.0.6200.754. Something in our application causes the Symantec Tamper Protection EXE to lock out our LabView app and all other software including the XP task monitor for periods of up to 5 seconds at random intervals. If you disable tamper protection, the application runs fine. You can also download a standalone version of Symantec AV and the application runs fine. So it seems like it is something about the Symantec Tamper Protection.

 

There is nothing in the logs.

 

Seems like there is a conflic between my app and Tamper Monitor.  What could cause the Tamper Monitor to freeze my computer?

 

/Peter

some parts quoted from my boss