13 hours ago, andrew_nz said:
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<span> </span> If you are a non admin user or you have UAC prompts on full, and you don't OK a UAC prompt or have a task that bypasses the UAC prompt you can <strong>not </strong>modify, add to or delete files in certain folders. Windows, Program Files etc.
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Which is why UAC asks a non-admin user to enter an admin username and password - to temporarily use admin rights for that task, and only for that task.
Some apps that can modify the system and settings allow you to choose to skip the UAC for that particular app but still using it for everything else.
For those particular apps it's up to you to <em>as an admin user</em> to decide if you want the UAC security on or not for that particular app.
As you rightly say <em>a non-admin user</em> should not have that choice, see below.
Some apps, such as antivirus/antimalware apps bypass UAC as standard and don't give you a choice, you wouldn't want the AV/AM not launching just because a non-admin user couldn't supply an admin password.
I know of at least one security app (Malwarebytes) that doesn't ask for UAC confirmation when it starts - but needs UAC confirmation if you want to stop it running.
That's to prevent non-admin users from turning off the antimalware protection.
In the end UAC is a tool - it's (mostly) your choice as an admin user if you use that tool or not.
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If no UAC is required does that mean a non admin user is able to delete stuff from those protected directories using CCleaner?
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To answer your original concern about a non-admin user getting elevated privileges by ticking 'Skip UAC' in CCleaner, - a non-admin user can't do that.
As you can see in this screenshot for a non-admin user the option is greyed out and unselectable:
(And yes, I usually just have an admin account and had to create a new non-admin account to get the screenshot).
![Screenshot 2021-10-24 102059.png]()
PS. I did see your report/request but there is nothing wrong there and the posts can stand as they are