Installer Installation error - If you are receiving the above message during the installation of ON1 PHOTO RAW 2021, follow the steps below:
Restart your computer.
Download and run a registry cleaner, we recommend this free one:
Then reinstall using our latest installer:
Make sure you Save the file rather than choosing Run. When the installer has finished downloading, please temporarily disable your antivirus software and the right-click on the installer.EXE and choose "Run As Administrator".