Optical Drives menu hangs, leading to VB crash

[xerces8foo]

One thing we can try is to look at Virtualbox's config files for any unregistered iso's.

Please reboot your host so no Virtualbox processes are running.
Go to {home}/.config/virtualbox, Virtualbox, and copy "Virtualbox.xml" to your desktop.
Open Virtualbox. Right-click each VM in the main Virtualbox window's VM list, choose Show in Explorer/Finder/File Manager. Copy the VM's .vbox file (not the .vbox-prev file) to the desktop. (Configure your host OS to show all extensions if the folder that opens does not show a .vbox file.)
Zip the desktop copies of Virtualbox.xml and all the .vbox files, and post the zip file, using the forum's Upload Attachment tab.

attached

[fth0]

<ExtraDataItem name="GUI/RecentListCD" value="
C:\Users\xerces8\Downloads\Windows-10ENGx64_2022may_.iso,
C:\Users\xerces8\Downloads\Windows10ENGx64_2022may.iso,
\\mirkos\SingleClm3\isos\Windows10x64_ENG_1809.iso,
C:\winsux\ISOs\ubuntu-21.04-desktop-amd64.iso"/>

I'd suspect the red colored one (line breaks and colors added by me)

You can safely change the list with VBoxManage setextradata global "GUI/RecentListCD" "C:\Users\xerces8\Downloads\Windows-10ENGx64_2022may_.iso,C:\Users\xerces8\Downloads\Windows10ENGx64_2022may.iso,C:\winsux\ISOs\ubuntu-21.04-desktop-amd64.iso".

[xerces8foo]

Thanks, this fixed the delay.

Note: the ubuntu iso file does not exist at the specified location. Why is it kept in the list? (it is not displayed in the menu)