In one of my workbook sheets, I have a section of about 10 rows that I've grouped together. When I go to ungroup the rows using the "+" sign, it freezes Excel -- BUT, it only freezes if the following conditions are met:
- If I'm scrolled all the way over to the left of the sheet - if I scroll over even one column so that column A is no longer showing, I can expand without issue.
- If Excel is maximized on my monitor - if I'm anything less than full screen, I can expand without issue.
- If I'm on my primary monitor - if I drag excel over to my second monitor, I can expand/regroup without any issue, whether maximized or not.