Hello, FLAP33000
Welcome to the Microsoft community.
Thank you for your feedback. Your issue may be related to the Windows Search Indexer service. Here are some troubleshooting options:
Option 1:
Open Task Manager (Ctrl + Shift + Esc).
Go to the Services tab.
Find the “Windows Search” service.
Right-click on it and select “Stop”.
Observe if File Explorer stops freezing.
Option 2:
In the Indexing settings, click Advanced Options.
Click Rebuild Indexes.
I look forward to your feedback. It will help me to pinpoint your problem.
Best Regards,
Aaron | Microsoft Community Support Specialist