Hi formasters777:
If I run a Custom Clean in CCleaner Free v6.38 and click the “Run CCleaner” button (i.e., after the preliminary “Analyze” scan as finished) one of two things happens as soon as my disk cleanup has finished:
- I see two pop-up adds nagging me to upgrade to CCleaner Profeessional (see the images in my 02-May-2025 post in web1’s Too many popups of ccleaner), or
- My entire CCleaner interface briefly turns grey / fades out as shown in the image below.
If you observe something similar then see Jeff_M’s 01-Apr-2025 topic Screen flashes. If I recall correctly this glitch started in CCleaner v6.34 and can occur if the pop-up adds fail to render correctly after a Custom Clean. User redwolfe_98 reported in their 02-Jun-2025 post in yomama’s CCleaner ver 6.34.11482 freezes computer for 10-15 seconds after cleaning finishes that this glitch locked their CCleaner interface and forced them to kill the CCleaner process in Task Manager, and the image in that post showing a “503 Service Temporarily Unavailable” warning suggests the pop-up ads sometimes fail to render correctly if there is a temporary disconnect to the backend CCleaner servers.
Dell Inspiron 15 5584 * 64-bit Win 10 Pro v22H2 build 19045.6093 * Firefox v141.0.0 * Microsoft Defender v4.18.25060.7-1.1.25050.6 * Malwarebytes Premium v5.3.5.204-137.0.5331 * Macrium Reflect Free v8.0.7783 * CCleaner Free Portable v6.38.11537 * HDCleaner Portable 64-Bit v2.091