Servus Community,

I’m currently experiencing the following problem with Excel 365 on Windows 11. If multiple Excel files are opened one after the other in Explorer, each file takes longer to open. After the fifth or sixth file, the waiting time is already between 10 and 15 seconds. This does not happen if the files are opened from Excel using the Open dialog, nor if multiple files are selected in Explorer and the whole bunch is opened at once.

I have already tried the following:

• Opening the files from different locations. Locally, over the network, from different servers.
• Created new empty Excel files for testing.
• Starting Excel in safe mode.
• Deleting temporary files.
• Disabling the virus scanner as much as possible (Microsoft Defender Business).
• Disabling hardware acceleration in the registry (HKEY_CURRENT_USER\Software\Microsoft\Office<Versi on>\Common\Graphics).
• Windows Search disabled.
• File preview disabled.
• Power plan set to high performance.
• A new Windows installation with a new Office installation, without applied group policies.

The behavior can also be reproduced at several workstations.

Any suggestions?

Bye CD