COMPRO IP70 User Manual page 58

c. Please ensure that your security setting under Internet Explorer allows
the installation of ActiveX component by adding the IP address of the
camera to the list of trusted sites in Internet Explorer.
If you've done all of the above and still unable to get the video / audio on the
browser, please delete all of the files under OS Drive\Program Files\Compro
Embedded and reinstall the ActiveX client. Finally, if you encountered the error
where the browser returned "213 file not found", please restart your computer
which should help in this situation.
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IP70 IP Camera User's Manual