Why does "COM Surrogate" block me from deleting files on Windows 11?

Your screenshot shows a JPG, so the likely trigger is File Explorer generating its thumbnail or reading image metadata. Windows often runs those tasks through COM Surrogate (dllhost.exe). A temporary lock is normal; one that stays stuck is usually a preview or thumbnail-handler problem, not evidence of a hardware fault or malware.

Try this before rebooting:

1. In File Explorer, turn off the Preview pane with Alt + P if it’s enabled. Close any photo viewer and other Explorer windows displaying the image.
2. If deletion is still blocked, open Task Manager, select Windows Explorer, and choose Restart. Let any file-copy operations finish first, then retry deleting the file.
3. If the lock remains, use Windows Resource Monitor > CPU > Associated Handles and search for IMG_6883.JPG. If it identifies a dllhost.exe process, note its PID and end only that matching process under Task Manager > Details. This may interrupt its preview task, but avoids rebooting the whole laptop.

For a recurring problem, test File Explorer Options > View > Always show icons, never thumbnails. If that stops it, leave thumbnails disabled as a workaround, or clear the Thumbnails cache through Disk Cleanup and re-enable them to test again.

Don’t delete dllhost.exe or try to disable COM Surrogate permanently—it’s a Windows component used by other features too.