Run Time Error - at 406:278 -Access Denied

PLEASE IGNORE.
By mistake posted twice, as I as got an error message at first attempt.
See earlier post.

Hi,

I am upgrading PDF Creator 1.7.3. While installing the
version 1.7.3, it gave a message that old version needs to unistalled,
for which I agreed to.

After the old version got uninstalled, the new version could not be installed. It gives the error message "Run Time Error (at 406:278) Access Denied"

However,
I can reinstall the old version i.e., 1.7.0. Again after manually
uninstalling the old 1.7.0 version, I am unable to install the version
1.7.3.

Please help me to install the version 1.7.3 on Windows 8.1

Thanks for your help