How can I remove CleanParaeterfid from my imac. I need to upgrade my softwear

Click the BLUE TEXT. Those are links to Apple help articles that address your issue.

Please read About those "<app> will damage your computer" messages - Apple Community.

Please read About those "<app> will damage your computer" messages - Apple Community.

Please read About those "<app> will damage your computer" messages - Apple Community.

haw can i uninstall CleanParameterfld from my PC?

If by "PC" you mean a Windows-based machine, you should try a Windows support forum for a better chance that your post gets answered.