Try it from the link below , choose save when the window opens and save the file to the desktop, then double click it to install Cleaner. That error you're getting is an Internet explorer error, you would need to change the security settings in the browser to medium. Lets see if this works first. Here is a link that might be useful: ccleaner/download/slim

Owbist, I have always used it like you do, but all of a sudden it cleans the settings/memory or whatever from MSSE and it says I am not protected. I researched and read that I should uncheck MS Antimalware in windows section of CC which fixed the problem. I was also told if that did not fix it to uncheck the MS Management Console. Later an another upgrade for CC the colors of my visited and unvisited thread were lost. I contacted CCleaner and was told to uncheck everything related to FF. Then this last upgrade the thing I had un checked came in checked again. I knew this time how to fix it. My main reason for starting this thread is because I remember someone saying they used another software to clean with.

For added security, I would suggest you download and install Spyware Blaster. All you need to do is update it periodically. Here is a link that might be useful: Spyware Blaster

The default settings are the ones that the application comes with. If you haven't used it in some time, it will probably tell you there is a newer version. Download and install the latest version and use it without fear. Like azinoh I have used both the clener and registry tool with no problem, always backing up the registry. This is just one step in my routing maintenance before I defrag.