THANK YOU, THANK YOU, THANK YOU!!!!!!
I've almost been in tears over all this, as I thought I'd have to close my blog down, after all the hard work I've put into it and YOU have fixed it!!!! THANK YOU!!!!!!!
It was the first suggestion you said, something wrong with the compatibility of my Internet Explorer 10 and WordPress. I have BT Broadband, a Windows 7 Core I5 HP laptop which is only a year old and I use the latest version of Google Chrome and IE 10. Sigh...
When I clicked on your link about the Compatibility it showed me what the symbol looks like, and sure enough it was in the address bar of my blog. So I clicked it to turn it off as you suggested and magically that did it!!!! I can now edit posts, access stats, my widgets are back in their proper places, I can publish, the writing buttons have reappeared and I'm guessing that my Add Media will work as well.
Oh, I really can't thank you enough, Jackie. MASSIVE hugs to you! :D xx