If the PC is running normally and there are no symptoms such as File Explorer crashes, steadily increasing memory usage, or performance degradation, there is likely no immediate cause for concern. However, if you want to verify whether the warning is a real issue or a false positive, you can monitor explorer.exe with Microsoft Sysinternals Process Explorer and watch the Handle Count over time.
A true handle leak would typically show the handle count continuously increasing without dropping. If problems develop later, third party shell extensions are a common area to investigate.
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