Norton Internet Security / Windows 7

Everyday I start a full system scan. NIS completely disappears from my screen after awhile. I then have to restart my computer and begin the full system scan again. After that the scan completes successfully.

 

Any ideas how to fix this?

 

Windows 7 Ultimate 64-bit

NIS 2010 latest build.

Message Edited by SGFC on 11-28-2009 05:46 PM