An error message that states “Error opening file for writing” may appear for CCleaner. Most of the time, this results from the software being unable to make changes to the files in question. To address this problem, opt to run CCleaner in administrator mode. Right-click on the CCleaner shortcut and select “Run as administrator.” Granting higher authority privileges to this program can help resolve access problems.

If running as an administrator does not fix the issue, there may be other contributing factors, like certain antivirus software preventing CCleaner actions. Reopen Windows after turning off the antivirus and attempt the operation again with CCleaner, but make it a priority to turn the antivirus program back on immediately after this operation. It is also good practice to always have an up-to-date version of CCleaner, as bugs causing the error may have been resolved in the newest versions. If the above methods do not work, consider reinstalling CCleaner. Remove the application, go to its official website, download the latest version, and reinstall it. These steps should resolve the error and allow CCleaner to run smoothly.

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