I can't drag and drop with only iClone 7 such as audio (mp3 file) or drag an iAvatar from a Windows folder.
The pointer turns into a do not circle with a line across.
What do I ave to do to make drag and drop work?

I have this issue as well among others, i'm currently trying to figure out the cause of this issue, and i suspect that the installation of the latest patch via rl hub might be the cause, did you update to the latest version via the hub? Later i'm going to reinstalk but i'll download the patches manually and see if they are related.

Hmm, interesting... I have no problem with drag n' drop. I can drag practically any IC related content from Windows folder and drop directly to the IC stage.
I also have the latest RL Hub and I did update all my RL apps to the latest version with it. There should be some other reason for inability to drag/drop... related to Windows?
I am running windows 10 v1709 (no intention to upgrade to the buggy 1803)

Try pressing the Escape key while you have your left-click help down. See if your drag and drop comes back.

It may depend of what version of Windows and even between version builds as well.

I have the latest version of Windows 10 on my laptop and it can drag and drop but my desktop which I had to roll back Windows because of audio issues cannot drag and drop. My laptop also has audio issues due to the latest version of Windows build but not as bad a concern for what I usually do with it.

Damn! I also lost drag n' drop today! Cannot get it back. No changes in windows/drivers... etc. The only thing I did, AFAIR is updated Motion Live to 1.01 via Hub a few days ago....

So I found a solution to allow drag and drop to all my programs, but it's a sledge hammer to kill a mosquito.
The solution is disabling the UAC, this will make your computer more vulnerable to attacks so

AT YOUR OWN RISK WARNING

Basically I completely disabled UAC in the registry.
Previously, I had UAC to the lowest setting and it still didn't allow me to drag and drop.
I followed this tutorial as it is the only one that works for me:
https://www.mladengradev.com/en/how-to-get-back-drag-and-drop-in-windows-8/
Works with 10 also.

Does any of this help?

https://appuals.com/drag-and-drop-not-working-on-windows/

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Alienware Aurora R16, Win 11, i9-149000KF, 3.20GHz CPU, 64GB RAM, RTX 4090 (24GB), Samsung 870 Pro 8TB, Gen3 MVNe M-2 SSD, 4TBx2, 39" Alienware Widescreen Monitor
Mike "ex-genius" Kelley

I found my problem. It is not an update. The other day I have enabled running iClone as Administrator and that disabled drag 'n drop... WHAT??
Did I say that I hate windows 10? Control, control, control! They think they know better what we need and what we don't!
I'll try to figure out why it did disable drag/drop...

I found this exact solution under drag and drop problem for Photoshop, it but I didn't use it as comments indicated that it causes file association problems, stuff not opening.