Tick the checkbox for Full control under the Allow section. Step 2. In the Properties window, navigate to the Security tab and click on Edit. Right-click the CCleaner setup file and select Properties. Some users reported that they fixed CCleaner not opening Windows 10 just by changing the file permissions to full control. Now, you can restart your system and see if CCleaner not opening Windows 10 is resolved. Select the checkbox for Run this program in compatibility mode for and click on OK to save the changes. Step 2. In the Properties window, navigate to the Compatibility tab and tick the checkbox next to Run this program as an administrator. Step 1. Right-click the CCleaner shortcut on your desktop and select Properties. To fix this issue, you can run the setup file as an administrator. In some cases, CCleaner won’t open on Windows 10 if you don’t have the necessary privileges on your computer. Right-click the CCleaner entry key from the list of entries and select Delete.Īfter you exit the Regedit Editor, you can check if the “CCleaner wont open” issue has been resolved.
HKEY_LOCALMACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\ In the Registry Editor window, navigate to the following path from the left side menu: Press Win + R keys to open the Run dialog box, and then type regedit in the box and hit Enter. To fix the problem, you can try deleting the affected CCleaner entries from Registry Editor. Remove the CCleaner Entry Keys from Registry EditorĬCleaner not opening Windows 10 can be caused by issues with the registry files of certain applications. Now, you can restart Windows and check if the “CCleaner wont open” issue still persists.
Step 3. Tick the checkbox next to Turn off Windows Defender Firewall (not recommended) for both private and public network settings. Step 2. Click on Turn Windows Defender Firewall on or off at the left side. Step 1. Type firewall in the search box and select Windows Defender Firewall from the best match. Here we take Windows Defender Firewall for example: In order to run this program smoothly, you can temporarily disable your third-party antivirus software like Avast and even Windows Defender. Disable Any Third-Party Antivirus Program and Windows Firewall TemporarilyĪccording to a survey, some certain antivirus software is one of the most common reasons why CCleaner won’t open Windows 10.
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