I HAVE TRIED THE PORTABLE VERSION BUT NOTHING HAPPENS.
Are you able to download it? Or is it just getting recuva.exe to run that's giving the issue? The Portable build is just a zip file that you need to unzip into a folder to properly use such as: C:\RecuvaPortable
Do you get this error with any other things you try to install?
Try using a different browser to download Recuva. Do not select 'run' instead make sure you save the download to your machine first, then run the installer.
May also want to try installing and/or running Recuva from an administrator account. Or try what I've seen Hazelnut recommend in the past which has had success which is try to install it in Safe Mode.
If you post it capitals on forums it is considered to be that you are shouting. We don't do shouting here We are calm
If you try to install ccleaner in safe mode all it means is that programs which may interfere with it installing cannot do that because they are not running. It is perfectly okay to install CCleaner or Recuva in safe mode.
Then you boot back into normal mode and use them.
Make sure that you clean all you browser caches because if a download is corrupt your browser cache can try to give you the same corrupt download each time from the cache.