Thanks for your help, it was easy to follow and only required lots of patience (lol).
Your solution appeared to work and I discovered that an item called "Default Manager" caused the problem. I left it unticked and was able to paste OK.
I left the PC switched on, got up this morning and tried again. Paste no longer works - even though Default Manager is still unticked.
I have rebooted but without success. Is it worth going through the process again?
Your help is appreciated.
You probably have a second "Default Manager" in your list. You can click the header "Startup Item" to sort the list by name.
What is the "Command" for this entry? What is its location? You need to move the column dividers to see the full text.