You can manage the system restore points directly via the interface of CCleaner, here's how:
- Open CCleaner
- Click on Tools (left pane)
- Select "System Restore" tab
- All the system restore points are accessible (except for the last one)
- click to select and click on the "Remove" button for the ones you deemed as obsolete.
This document, titled « CCleaner - Manage system restore points », is available under the Creative Commons
license. Any copy, reuse, or modification of the content should be sufficiently credited to CCM