[CCleaner v3.08.1475 and Microsoft Security Essentials]

A Protector Application warns that it is failing to protect your system.

That is self evidently always true, it is incompetent;

it cannot even protect its obsolete logs that show what it is trying and failing to do.

Is it "Fit for Purpose" ?

 

A universally acclaimed rubbish remover Application does its thing,

which includes removing stale news and obsolete logs.

Is it "Fit for Purpose" ?

 

I for one vote against MSE

Strange attitude. 1) Logs are not rubbish. 2) Ccleaner cannot and should not assume logs are obsolete. In this case, clearly they are not. 3) A third party application assuming log files are removable does not make the 2nd party application unfit for purpose. It is a real-time scanner, and quite effective. Scheduled scans are -of course- important for maximum security. Creating a scenario that forces a user into running extra scans does not reduce security- it annoys the user. It's now quite clear that ccleaner causes this, thus your 'fit for purpose' argument reflects back onto ccleaner. That's unfortunate, as it is otherwise an excellent tool.