Hi web1:
Are you are referring to the series of pop-up ads like the ones shown below that appear after running a Custom Clean with CCleaner Free v6.3x? If so, I believe these are the same intrusive pop-up ads discussed in Jeff_M’s 01-Apr-2025 Screen flashes that can cause the CCleaner Free v6.33 and higher interface to flicker (i.e., temporarily turn grey) if these pop-up adds fail to render correctly after a Custom Clean.
I m guessing Avast / Piriform deliberately added this series of intrusive pop-up ads to try and push frustrated CCleaner Free users into purchasing a CCleaner Professional license. This is similar to the same aggressive tactic they used in June 2024 when they disabled the Custom Clean feature in CCleaner Free v6.24 without any warning, and then reversed their decision six weeks later and re-enabled Custom Clean after users expressed their anger and/or simply abandoned CCleaner Free and moved on to an alternate free disk cleaner - see the 100+ comments posted in Sectorgz’s 04-Jun-2024 CCleaner 6.24.11060 will not do a Custom Clean. Here’s hoping Avast / Piriform comes to their senses again and removes these annoying new pop-up ads before more users abandon their product.
Dell Inspiron 15 5584 * 64-bit Win 10 Pro v22H2 build 19045.5737 * Firefox v138.0.1 * Microsoft Defender v4.18.25030.2-1.1.25030.1 * Malwarebytes Premium v5.2.11.183-131.0.5227 * Macrium Reflect Free v8.0.7783 * CCleaner Free Portable v6.35.11488 * HDCleaner Portable 64-Bit v2.090