I have found what I believe to be a bug. I have researched it extensively but have found nothing. I apologize if I missed something. This is what I've got.

Excel 2010 in Windows 7.
1. Open New workbook
2. Select entire sheet, right click and clear checks from Format Cells\Protection tab.
3. Select any column, check "locked" on Protection tab. (use "L" for this example)
4. Select and HIDE columns M, N and O.
5. Protect sheet.
6. Select column L thru P (in order to unhide)
7. Right click

At this point, Excel locks up and requires closure of the program to regain control. This happens on every pc that I have tried it on. It appears to be right clicking on a locked column in a protected worksheet is the issue.

Anyone seen this before? Any info would be helpful.

Many thanks.
Wayne