CCleaner Installer Has Stopped Working

• The antivirus running on your computer may interfere with the CCleaner installer and this might be the reason for the CCCleaner Installer has Stopped Working problem.
• So, try to disable the antivirus feature temporarily and then install the CCleaner application on the computer.
• To check if you have permission to operate the CCleaner installer file by performing the steps mentioned here.
• Right-click the CCleaner file and select the Properties option to display the Properties window on the screen. Click the Security tab.
• Navigate to the Group or User Names section, select the Users option, and click the Edit button. Now, the Permissions window appears on the screen.
• Go to the Permissions for Users section and check if the box next to the Full Control option is checked below the Allow field.
• If not, remove the checkmark from the Deny field and change it by marking the tickmark in the Allow field. Close the Permissions window by clicking the OK button.
• The installation file name might be the reason for CCleaner stopped working problem.

• If this was the actual cause behind the problem, change the installation file name to CCleaner or Setup.
• Check if you can install the CCleaner application on the computer. If the CCleaner installer stopped working problem persists, carry out the solutions provided below.

Solution 1 - Removing Files Related To The Older Version Of CCleaner

• Search for the CCleaner files from the registry entries and delete them from the computer.
• To remove all the leftover CCleaner files from the entries, you are suggested to use uninstaller software such as Revo Uninstaller or IOBit Uninstaller.
• Once you clear all the CCleaner files, check if the problem is resolved.
• If the issue persists, go to the remaining solutions mentioned here.

Solution 2 - Check If Cleaner Is Running In The System’s Background

• If the older version of the CCleaner application is running in the background, you cannot install its recent version.
• Make sure to close the CCleaner application as per the instructions mentioned below.
• First, open the Task Manager window on the computer.
• Note: The shortcut to open the Task Manager window is to press Ctrl, Shift, and Esc keys at the same on the computer’s keyboard.
• In the Task Manager window, search for the CCleaner application from the displayed Applications list.
• Right-click the CCleaner application and select the End Task option.
• Install the CCleaner application again and check if the CCleaner Installer has Stopped Working issue has been resolved.