Task Manager - Performance - Colours?

On one of my machines, the task manager performance display shows some of the CPU usage in red and some in green.  This doesn't seem to relate to actual load - for example CPU usage might be 1%, with 1 red bar underneath 1 green bar; or 3% with all red.

My other machines don't do this - regardless of load, the display is always green.  I can't find anything obvious in the help to explain it - can anyone enlighten me?
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Hi cfit,

do you have the normal task manager or process explorer?

cfitAuthor Commented:
Windows Task Manager 5.1 (build 2600.xpsp_sp2_gdr.050301-1519 : Service Pack 2)
wow! i have never seen that happen with regular task manager!

The red graph is showing kernel times, that is how much cpu the core functions of windows are using. You can turn it in/off in the View menu

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cfitAuthor Commented:
Aha - excellent, thanks. I must have switched it on at some point and then forgotten about it
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