Problem with Message Box

[Peter]

When I use Microsoft Excel and Microsoft Word and I have copied and pasted a
large amount of text Office asks me in a message box if I want to use this
amount of text on the clipboard so that it is accessible from other programs.
I have no use for this message box and it does not have an "Do not show this
message again"-option to disable the message box. Do you know where in
Windows/Office where I can disable this message box?

Thanks guys in advance!

/Peter