My firewall can`t update!

My system is win7 32bit.When I update comodo firewall,it always give me the error message:
cmdhlp.sys: Error 0x80072ee2
what`s up? thanks!

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Which version do you currently have that you are trying to update from?

My firewall version is 4.0.I want to update to version 4.1.

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I don’t know. I guess you can back up your configuration, uninstall, and then install the new version.