The Summary Area
The Summary Area is a dashboard style interface that displays overall information about each type of cleaner. It also contains controls that allow the user to initiate common tasks.
The Summary Area is displayed by default whenever the application is started and can also be accessed by clicking the 'Home' button 
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The remainder of this section describes each element in the summary screen in more detail:
Clean my computer
Automatically cleans the user's computer based on the default profiles and user-defined settings for each scanning module. It performs consecutive Registry, Privacy and Disk cleaning scans and is a fast and convenient way to thoroughly clean your computer. There are no separate settings for Clean my computer. The settings for each module is taken into consideration when a clean is performed.
Active Clean (Pro/Pro Trial versions only)
'Active Clean' is a new, always-on, file and Registry and Disk monitor that keeps your system clean at all times. If enabled, 'Active Clean' scans your system in real-time to identify and delete invalid, corrupt and redundant files as soon as they are created. Apart from keeping your system in a continuous state of operational efficiency, it also makes the regular 'scan and clean' operations faster because many of the issues will already have been dealt with. You can configure Active Clean to perform Registry, Disk and Privacy cleaning operations from the General Settings interface accessible by clicking Settings > General Settings.
View recent activity (Pro versions only)
Comodo System Utilities maintains a log of events, i.e. the files deleted by its Registry Cleaner, Disk Cleaner and by the Active Clean feature. Clicking the 'View recent activity' link opens the log window that shows the list of files deleted.
You can also configure the application to include the log of files deleted by Privacy Cleaner by clicking Settings > General Settings and selecting the option 'Show recent activity for Privacy Cleaner'.
Registry Cleaner , Privacy Cleaner and Disk Cleaner Bars
Display the information about the Last clean-up, when the next clean-up is schedule and what is the default profile selected.
Quick Clean
Is basically a shortcut for each module. It takes you to the page for the selected module.
Registry fragmentation
Displays the fragmentation percentage of the registry. The registry defragmentation process can be scheduled at the next reboot on clicking this link.