About to Install NU2010, cannot uninstalle NSW2009

Just bought a copy of NU2010...1st should I uninstall NSW2009 V12.01 Build 1  ?

I tried uninstalling NSW2009 3 times, under add remove programs WXP, and I get the message below...any ideas?

 

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"Failed to install required components please contact technical support for assistance"

http://www.symantec.com/LCV3

Setup will now exit

OK

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Thanks

BY