Starting to look like this software is not as easy to use supporting remote users as Teamviewer is. That is a pity Do not need work arounds.

I have checked elevated account enabling. If this is to be set on remote computer with QS it to is a non option for unskilled retired people I use to help with their computers. Not sure if I could enable under remote control, mat lock/freeze as in other cases..

What is a properly elevated account? Unattanded access is not an option.
Many thanks.

Thanks for response David. No UAC prompt on remote PC and yes Quick support on remote. I can add that the freeze can be unlocked by getting remote user to close Ccleaner. Additionally the same freeze occurs when opening Task Manager on remote, same unlock method. ie Ccleaner and Task Manager cannot be controlled from master PC. Possibly other actions are similar, not yet discovered.
Having used Teamviewer for many years this is disappointing. I am trying to move from Teamviewer because they regularly block and a pain to get unblocked.

So Ccleaner is proving a problem not found in Teamviewer remote control. To make sure of no clash I uninstalled Teamviewer and Cloudberry, restarted then installed Cloudberry Remote Assistant.

Added info. Have Windows 10 ver 2004 on both computers. Find I can overcome window issues in Full screen mode, including closing Edge. However if I start the app Ccleaner on the remote computer the session freezes. Current overcome buy disconnect and re-connect and closing Ccleaner from the Task bar, cannot be closed within app.

Thanks Gleb. I have now mastered remote file transfer. It will be great to have drag an drop in the future.

Planning to move from Teamviewer. One thing that I feel will greatly improving file transfers is: to implement drag and drop files from one computer to the other, just as Teamviewer does.
Is this a future possibility?