I think that you probably had Microsoft Money installed on your system when you had XP Home. Now after upgrade, apparently some of the files concerning MS Money have been lost and as a result of upgrade XP Pro tries to recover them.
If the installer pops up just after logon and freezes the system, then try holding down the shift key while logging in to skip all startup programs. Then either uninstall MS Money from Add/Remove or re-install it yourself. Depends on whether you want to keep it or not.
If this fails, reboot and run XP under safe mode. The installer wont appear in safe mode and you can easily remove/reinstall MS Money from your system.
I upgraded windows xp home edition to professional. Once I start the machine windows installer try to install microsoft money.This process wont allow me to do any other work. Always try to install the money. Please let me know how to stop this.

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