For the past 6 months dotTech has been running a WinUtilities Professional Edition giveaway , allowing dotTechies to grab WinUtilities Professional Edition for free. Recently, because of a disagreement between dotTech and YL Computing (the developer of WinUtilities), YL Computing has canceled the WinUtilities Professional Edition giveaway and dotTechies will no longer receive free updates. If you have WinUtilities Professional Edition currently installed using dotTech’s registration information do not update the program or else it will revert to the trial version.
Furthermore, it seems like YL Computing has also canceled the giveaway with other sources like Softpedia, so you can’t grab it from there anymore either.
Update: I got a hold of WinUtilities Professional Edition 9.81 installer (the latest version that works with dotTech registration code); I uploaded it so dotTechies that want WinUtilities Professional Edition can use it (dotTech’s registration information works on it). Download it from http://dottech.org/downloads/WinUtilitiesPro_9.81_dotTech.org_Giveaway.exe . After installation, right-click on the system tray icon, go to “Settings…” and uncheck “Automatically check for updates”.
For those that feel the sting of no longer receiving free WinUtilities Professional Edition, dotTech has featured many system utilities freebies (Glary Utilities Pro  [now expired], WinOptimizer 6 , TuneUp Utilities 2008 , jv16 PowerTools 2009 [v18.104.22.1680], Advanced SystemCare Pro ) that one can use and there is WinUtilities Free Edition  that is always available for free. Plus, I am currently trying to get dotTechies some lucrative system utilities for free, so stay tuned.
I apologize for any inconvenience!