Hi,
From the start menu, type %temp% into the search box and open the temporary folder.
Select its entire content and remove it, it i all temporary files and you may remove those with no worries.
Next try launching the downloaded file and check for any difference.
If the same persists, open the temporary folder once again and then open the HP installation folder which starts with the 7z characters.
Open the subfolder with the printer name if a such exist, then go to the Utils folder, open the CCC folder and launch the Uninstall_L4.bat file.
Click Enter once once a command prompt dialog appears and several uninstall dialogs should appear.. confirm any dialog till being prompt to reboot your PC once the process completes.
Then try installing the software and check for any change.
Please let me know if that helps,
Shlomi