@JB007 I tried the newest version (15.5.1.0) just now. When I last used it, the scan would take over 15 minutes. Here it took a little over 1 minute and I have very little besides Windows installed on this drive so this is an average duration for me. One thing: if you've completed the scan but still have RK on the system, it will issue a nag popup to upgrade. No biggie for me as I uninstall it soon after but might annoy others because one may not expect it.