NIS 2010 Problem - Computer freezes when left idle for some time

After I let my computer idle for sometime and then come and start using it again it is frozen.  Now, this only starts after I install NIS 2010.  I first installed NIS 2010 when I used Vista, but I thought there was some issue with Vista and I just re-installed NIS 2009 and everything worked just fine.  I'm now using Windows 7, thought NIS 2010 would work fine now, but the same exact thing happens to me with NIS 2010.  I've turned off the Idle Scans but I still get the same problem.  Does anyone have any clue what may be causing this problem?  (Two different OS's same exact problem of computer freezing up while using NIS 2010, however, no problem with NIS 2009.  I'm also using a Dell XPS M1530 32bit system if that helps.)

 

<<edit: subject edited for more clarity>>

Message Edited by JerryM on 10-26-2009 11:24 AM