Tun.kext and pat.kext improperly installed..How to correct this problem?

Dear member of this forum,
I am using a MaxBook Pro (OSx Mavericks) and I get a message that
tun.kext                    and
pat.kext
are improperly installed.
How could I correct it?
Thanks you very much for your attention,
Jean Jacques

Thank you very much Kevin.. Nevertheless, I do not remember I installed a  [VPN software ] or  a [network monitoring tool].
How could I see the  [VNP softwares] and /or [network monitoring tool] installed on my MacBook Pro?
I tried to use "Network Utility" (in OSx Mavericks).. but I could not use it.

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