I want to send some attachments with Thunderbird but suddenly, yesterday, I am unable to get My Documents to open and select the required file. I can open Thunderbird as normal, and I can send text only emails, but when I select "Attach" then My Documents comes up but as soon as I click on ant folder then I get the message "Attach file - Not Responding". The window just stays like that until I close the programme. This a new problem from 1 day ago. I am using Windows 11, 64 bit Pro, fully up-to-date; I use Hitman Pro, fully up-to-date, 64 bit; and I use Malwarebytes, fully up-to-date, 64 bit. I have a Lenovo Thinkbook i7 with 1gig hard-drive and 16 gb RAM. I keep everything current and up-to-date, and programmes like Adobe Acrobat 2020, Hitman Pro, Malwarebytes are all paid-up subscriptions and all up-to-date. Perhaps someone might have a solution to save having to to reformat my Email programme to Firefox or MS Messenger or some other thing.