This is probably more likely a problem with my operating system, Windows XP, SP2, than CCleaner.  I just installed the latest version 5.4 over an older version, 3.01, which was working fine. But when I try to start the new version I get the following error message: "The procedure entry point GetLogicalProcessorInformation could not be located in the dynamic link library KERNEL32.dll".  I suspect this is because it was expecting the SP3 KERNEL32.dll? Since I am about to retire this PC in the