CCleaner Free v5.17.5590 (64-bit) thinks all my browsers (Chrome, Edge, IE) are open even though none of them are. I'm running under Windows 10 64-bit with all patches installed. I OK "closing" the browsers and then CCleaner works fine. I can't figure out what makes CCleaner think all my browsers are open, especially because I only use Chrome except in rare occasions when I need to use a Microsoft browser.