Using Excel 2007 - when I copy a row of cells from Excel (containing numbers
and text), and paste them into an email (outlook 07 - plain text format) -
the "paste" takes 3-4 minutes each time. It has only started happening in the
last week or two.

Also, not sure if it is related - but when I filter a list (approx 10,000
rows) - and filtering down to about 5000 rows - it hangs -(not responding
message) - or takes up to an hour to do.
There are no hidden formats, no formulae used in the spreadsheet.
Ive tried using an add-in to remove hidden formats etc but no luck.
Any ideas what else I can try?