I'm new to Slim Cleaner and I think it's a wonderful cleaning utility companion to CCleaner which I use exclusively.

I've notice that with a fresh install of Windows 10 Home, Slim cleaner does not close Firefox, Chrome and Internet Explorer even when prompt from within the utility to close open web browsers for cleaning.

This is not an isolated to just Slim Cleaner as CCleaner on Windows 10 Home has problems detecting if Edge is open, it's almost always asks to close Edge even when the browser is not open when cleaning.

My Windows 10 Home is fresh install and not and upgrade with all the proper drivers and not conflicting software with Slim Cleaner so I highly suspect this the an Slim Cleaner problem with Windows 10.