Issue with windows 10 creator update and cccleaner. in CCleaner Bug Reporting Posted February 17, 2018 · Report reply On 4/22/2017 at 18:15, Andavari said: No fix yet as it was only reported the other day. Until Piriform comes out with a fix it's recommended that nobody uses CCleaner to remove the Windows.old folder. If you must remove Windows.old instead only use the built into Windows tool Disk Cleanup to do it which supposedly doesn't damage the OS. I have had the same problem with Windows build-in disk clean up. But that was build's ago. Could by best to do as the boss stated, or as Mark Twain once said. I will learn how to master that bicycle some day.