Installation Error 1402

I've tried several times to install V19 but always get the error shown in the attached
screen capture. I am running Windows XP Pro and have admin level rights to the machine.
The install program is complaining that it cannot finish because it cannot gain
access to Threed.SSCheck/CLSID.
Any help in understanding this error would be very helpful.

Re: Installation Error 1402

This appears to be an ActiveX control from Sheridan Software Systems. Admins should
have full control permissions and you may wish to investigate the permissions on
the registry hives and change them. I do not know what may have changed permissions.
We deliver a file called threed323ocx but not the one that seems to be identified
in this CLSID, which is C:\windows\system32\ssa3d30.ocx.