Windows xp sp2 100 % cpu usage.

from some time my cpu usage was 100% most of the time.
2 cmd.exe keep running in background consuming all the cpu.
i booted my pc in normal mode in which i was facing
100 % cpu usage and Killing both cmd.exe REALLY
FREED CPU and my cpu usage dropped from 100%
to 0~10%.
but cmd.exe keeps starting again and again and i am pretty sure that the culprit is cmd.exe and NOPROCESS WAS DISTURBED because of closing of cmd.exe.
help me.
its driving me nuts…

You need to be on XP SP3.

Please read:
Support for Windows XP Service Pack 2 ends on July 13, 2010
http://support.microsoft.com/gp/lifean31

hi just a quick question…
will my data be lost after installing sp3.
i have downloaded and waiting to install

no…it is a normal winupdate

the recomended way is to run windows update and let it download what it want and install