imac (early 2009), OS 10.10.1, MS Office 2008.
At 9:30pm I worked with several documents in Microsoft Word.
At 10:00 pm, I can not type in those documents, or even a brand new document.
I type but the cursor doesn’t move. I can type in documents of OTHER programs but not Word.
24 hours ago the OS updated but no changes between 9:30 (when Word worked) and 10pm (when word stopped working).
On line I read that turning “document tracker off” might help, but I did not turn it on.