How To Repair CCleaner Won’t Open Error

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CCleaner is one of the most popular programs for cleaning and optimizing a computer. Although there is a free version, this program offers the possibilities of the most expensive programs of its kind. It keeps your computer clean and increases its operating speed by removing temporary files and caches from the browser and repairing DLLs and registry. It has several features to customize and optimize your computer: Duplicate Finder, Disk Analyzer, Startup, System Restore and much more.

Many users complain that they cannot start the installation because of the error “Windows cannot access the specified device, path, or file. You may not have the appropriate permissions to access the item.” There are many possible causes, but most of them are simple and easy to fix, so here are some ways to solve this problem.

April 2020 Update:

We now recommend using this tool for your error. Additionally, this tool fixes common computer errors, protects you against file loss, malware, hardware failures and optimizes your PC for maximum performance. You can fix your PC problems quickly and prevent others from happening with this software:

  • Step 1 : Download PC Repair & Optimizer Tool (Windows 10, 8, 7, XP, Vista – Microsoft Gold Certified).
  • Step 2 : Click “Start Scan” to find Windows registry issues that could be causing PC problems.
  • Step 3 : Click “Repair All” to fix all issues.


How to repair the cleaner does not work on this version of Windows?

Cleaning registry editor entries

Delete all CCleaner entries from:


HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\

Malware uses a registry trick to prevent some applications from opening. In this case, you must copy C:\Windows\System32\regedt32.exe to the desktop, rename it, then run it.

Some executable files that appear in this section must exist, so do not delete them. Delete only what you can’t start.

For some users, the error message “You need TrustedInstaller authorization to make changes to this file” may appear when they try to rename the file. Then you can read our guide here. Or you can launch “adwcleaner” and “Malwarebytes” which can find conflicts and then launch regedit.

Run CCleaner in compatibility mode

Windows allows you to run programs in compatibility mode for similar situations.

This is to ensure that programs are not blocked due to higher versions of Windows, and this feature will help you run CCleaner on Windows 7 or other environments.

To run CCleaner in Compatibility mode, right-click on the installation file and click Properties. The menu below opens and clicks on Compatibility.

Then check the box “Run this program in compatibility mode for” and select Windows 7 or Windows 8 from the drop-down menu as described below. This will change the current installation environment of the program and help it run.


Overall, the above linked forum article is a good article. If you have installation or download problems with CCleaner, it may be a good idea to add it to your bookmarks. It worked well for me, so it could work for you too.

RECOMMENDED: Click here to troubleshoot Windows errors and optimize system performance