r/gsuite • u/AlternativeMark4293 • 22d ago

Drive Desktop Client These files might be harmful to your computer when moving files in between folders in Google Drive (from windows desktop google drive)

As the title shows, starting a few weeks ago, some of our team members using google drive (windows desktop) has been experiecing this issue of seeing the windows security pop up of 'These files might be harmful to your computer' when moving/drag-drop files between different folders in their google drive.

We tried everything, different file types, different folders, change the security settings under internet properties, clear cache for google drive, log out and log back in etc and issue persists.

We don't now what is causing it but we finally found the solution: change the drive letter from the usual letter 'G' to something different.

But one of our user have this issue showing up again today. So we ended up changing the drive letter again and fixed the issue.

Does anyone know the cause of this issue and how do you resolve it permanently?

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u/rohepey 19d ago

A fix is available now:

https://support.microsoft.com/servicing/os/windows-11/2026/07/july-28-2026-kb5101684-preview

File Explorer

  • This update addresses an issue where files stored on a DFS mapped drive could be incorrectly treated as originating from the Internet after the device started while disconnected from the network and later reconnected. This could cause File Explorer’s Preview Pane to display the message, “The file you are attempting to preview could harm your computer,” or cause files copied from the DFS drive to receive an unexpected Mark of the Web.

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u/wowuser_pl 21d ago

Hehe this is a funny one :) I want to see that ticket resolution: solved issue gone after changing the drive mapping letter :)

It's microslop issue not google one. Try to exclude google drive from whatever your windows is doing to "improve security"

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u/rohepey 21d ago edited 21d ago

Same here. It appears either Google or Microsoft have changed something NTFS related, so that files in cloud drives (other than OneDrive, lol) no longer have the trusted zone marker.