If you're looking to transition from Windows to Linux but your users are not technically inclined you may want to evaluate Linux XP Desktop 2008. Linux XP tries to emulate the look and feel of Microsoft Windows. The goal being to make the transition to Linux easier for those used to Microsoft like operating systems.

Advanced WindowsCare Professional from IOBit is an advanced Windows optimization and maintenance utility providing PC users an fully automated, all-in-one PC Healthcare Service including anti-spyware, privacy protection, system optimization and cleaning capabilities.