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.
Solution 3 - Running The CCleaner Setup File As Administrator
Right-click the CCleaner installer file and select the Run As Administrator option from the displayed context menu.
Now, the CCleaner setup begins.
You can now install the latest version of the CCleaner application on the computer.
If required, get help from our technical experts to resolve the CCleaner Installer has Stopped Working problem.