TCS, thanks for your efforts
Yes I'm virus updated and have run a scan. I've also checked separately for the Welchia.Worm.
Enable is selected in Tools / internet options / security tab / custom level / scroll down to 'Drag and drop or copy and paste files.
I cannot paste using Ctrl + V = Paste
I'm not using a limited account.
Please note that a paste works at the second attempt.
I'm still stumped!
Regards
Exeng