that CCleaner is the culprit - it looks for, and cleans redundant and superfluous registry files etc. on your hard drive.
You can import your site from the server using the 'import' command from the file menu in FrontPage, and similarly you publish be using the 'publish' command.
The way to work is to publish your site files to your hard drive first, and then to your hosting location. If you want more detailed advise let us know, and one of us will try to help.