Comodo Firewall on Vista

Trying to install new version 4 on Vista HP SP2
Several tries no luck

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Welcome to the Forums, Rdamoth.

Did you uninstall any previous version? If so, did you reboot prior to the new install?
You could also try running the installer as Admin.

I didn’t uninstall b4 hand, but installer did the uninstall.
rebooted several times.
Forgot about ‘Run as admin’
Will try that

When that doesn’t help try this unofficial clean up tool after you rebooted after uninstalling.