Not only does what you install in this OS matter, order matters. Imagine the poor soul that installed those titles in the order of A, B then C. The next machine had item B already so they installed items A and C.
Then they find the machines don't behave the same.
This and other mysteries are the stuff of PROCESS EXPLORER and many weeks of investigation.
Try other antivirus packages. We have the Google Pack offering, Free AVG, AVAST and you could go on and on. NOD32 often is what many that are speed conscious end up with.
As we have found it to be a combination of this and that, I consider my contribution to this to be at an end. I have now unsubscribed as all that is left is for you to decide what solutions you want to mix on this machine.
Bob
XP takes a very long time to start after installing Google Chrome. However if I uninstall it XP goes back to normal. Can you please helo as I like to use Google Chrome however the slow startup is annoying.

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