When 0patch Agent is installed, and whenever it downloads new patches, it scans local drives to find “Patchable Modules”, i.e., the exact executable files for which one or more patches were written. The result of this scan is reflected on the “Patchable Modules” list and “Relevant Patches” list.

However, because 0patch does all the patching in memory only, a patchable module has to get loaded in memory of some running process in order for its patches to get applied. Scanning for patchable modules is only done so that the user (or the computer’s administrator) is aware which patches are there waiting to be applied as needed, even before they are actually ever applied.

This was taken from 0Patch FAQs  – maybe it helps?