[quote user="Jerry Wise"]That only shows the other computer is configured differently and has chosen different MSWindows options. That computer has some known extensions hidden, not shown. Your computer does show the same extensions you were searching for.
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Jerry,
Thanks for the prompt reply. Both computers are running Pegasus. Email from one PC can be transferred to the other. (In the early days of email, my wife elected to use my email address rather than (as I recommended) having her own. It is fortunate that we are still happily married!)
Neither Pegasus is on C:. The hard drives are split into logical drives, F: being the applications drive and G: the user data drive. So her folders are in a directory on G:.
You have made clear to me that the problem is not a Windows issue.
On my wife's computer, I just tried preparing an email for sending. When I tried to Copy Self to the Howard folder, Pegasus complained of a disk error. I then moved the emails in Howard elsewhere, deleted the Howard folder, created a Howard 2 folder, copied the emails from elsewhere to Howard 2. I then moved a received email to Howard 2 with no problems.
So I learn that checking consistency (and finding it OK) and re-indexing doesn't necessarily make a folder OK.
BTW Could I have named the new folder Howard, like the deleted one? Or does this cause problems in Pegasus?