A major Security Alert has been issued warning of malware contained in the installer of the free CCleaner system cleaning utility. Piriform, makers of CCleaner, have confirmed that the affected version is CCleaner 5.33, available from 15 August 2017 to 12 September 2017. Importantly, Piriform says the malware only affects Windows 32-bit users. If you’ve installed version 5.33, you should upgrade to the latest Version 5.34.6207 of CCleaner or newer. If you believe you’ve been infected, at present the only way to be sure of removing the infection is to do a Windows reinstall or restore from an unaffected backup.