I have two problems with Excel 2010:

1 If a spreadsheet has a macro, however small, and therefore becomes a .xlsm file it takes an age (well, at least a minute) to open and close. With earlier versions of Excel there was no problem (ie they opened and closed instantly).

2 If I edit a spreadsheet by cutting and pasting an area the spreadsheet will subsequently become unresponsive when trying to close it and the only way out is to use Task Manager to end the process. Naturally I then have lost all the editing I did.

Are these changes to Excel's behaviour well known and has anyone any ideas on how I might solve the problems, please?

Many thanks