excel 2010 very slow to open/save workbook

this is what is in my DDE setting for application to open. DDE is checked.

"C:\Program Files\Microsoft Office\Office14\EXCEL.EXE" /dde

that is a great thought.... I didn't have any other workbooks, so I just made one with one line of text and saved it to my desk top. It saved and opened instantly. So something would appear to be an issue with my workbook...not the program. However... the same workbook opens fine on my laptop which is running Office 2007

I didn't actually change any DDE settings (i don't think) that was advice I followed from some other place offering solutions. No My workbook is VERY basic. It is my work records. I am in the medical business...it is just a list of patients, dates, and minimal other data. Only 2 sheets being used in the workbook.
total of about 200 rows, and 12 columns. As I mentioned, one of the columns has check boxes in it, but I can't imagine that is an issue.

a little embarrassed, but i am not sure how to do that in 2010... I will look about and see if I can find the function. I did however try to just copy and paste it into a new book...that didn't work, I also saved it in "97 - 03" format... again, no change.

thanks.... but i am afraid it is somewhat frozen now... All very strange. I think I may have to re-create the damn thing from scratch

found it..... I copied each column seperately into a new workbook and saved at each step. They all saved, close and reopened instantly until I did the column with the check boxes..that one brought everything to a halt.