With game window active, CPU utilization of csrss.exe spikes when moving mouse over Task Manager fields. To reproduce this, open game, open Task Manager as shown, click on title bar of game to activate window, and then just move mouse cursor back and forth over field names of Task Manager (Image Name, etc.), but don't click anything:
With game not as active window, CPU utilization of csrss.exe goes down. To reproduce this, just click on the Task Manager border to activate that window, and then move mouse cursor back and forth over field names:
With TE2009 closed and Internet Explorer open, the same test but with Internet Explorer as the active window does not result in csrss.exe having excessive CPU utilization:
That explains what I am experiencing somewhat. Maybe this is not just a problem with my computer. Are other noticing similar issues?