I have a macro which hide unwanted rows (2500++ rows).

When i run this macro on Excel 2002 everything is fine and very fast (around
10 sec). BUT when i run it on my colleague PC (which has better spec then my
PC) and on Excel 2003, the macro runs like a SNAIL.

What gives?????????????? It is only running fast when I set the Calculation
from Auto to Manual.

I know it is easy to just add in two more lines in my macros BUT i have
something like 100++ Excel files which has this type of macro and those files
are not small. Their size ranges from 5MB to 30MB. Needless to say there are
a lot of macros in each file.........

Why is Microsoft doing this to me???? *sobs*

Would appreciate if anybody can give me an alternative solution (i dont want
to spend the next few days just changing macros).

Thanks in advance.