Auto complete not working

After using CCleaner, my AutoComplete non longer functions, i.e., it won't save user names and passwords. I've read everything I can find on resolving the issue on this site and have done all suggestions, but nothing is working. I use IE7. I have all the boxes checked in Internet Options to save passwords, etc. Perhaps I'm missing something or need more detailed instructions on how to correct this problem. Can anyone help me, please?