I'm experiencing a similar problem with CCleaner PRO Free Trial v5.82.8950 (64-bit) on Windows 10 Home Single 21H1 (OS Compilation 19043.1081): Ccleaner Driver Updater updated some drivers and, at the ending process, just reported that some drivers were'nt updated (no more explanation). I tried do the process again and nothing happened, even trying start updating individually.