Never before seen error message

When trying to update to the latest build of CCleaner I am getting a Windows message I have never gotten before. A screen shot is attached. I have tried to rename the file, right click and run as administrator, and move the file to a different drive with no success. I have tried other .exe files with no problems. Any ideas would be appreciated.

post-72243-0-38074200-1425344290_thumb.jpg

Could an anti-virus software be blocking you from accessing it?

It shows a double extension in your screenshot.

ccleaner.exe.exe

Windows cannot find that.

Download new slim build from here and try installing that over the top.

https://www.piriform.com/ccleaner/builds

Could an anti-virus software be blocking you from accessing it?

It shows a double extension in your screenshot.

ccleaner.exe.exe

Some antivirus' will automatically block double extension files!

See if any of this helps:

http://forum.piriform.com/index.php?showtopic=5739

In particular don't name the downloaded file ccleaner.exe