memory problems.. either not enuf, or there is a memory leak..
Just a quick guess ,,
But more often Run time errors can be caused by anti virus, a software bug, or some other conflict.
All to often a software tries to use some module that does not connect exactly right. I n your case it is trying to use the clipboard to copy something and crashes.
And most often
There are known problems with nortons and McAfee suite.
Your program is likely trying to talk to some module and the anti virus is preventing it..