Well, in Windows 7 (on my PC) in 1 out of 3 times the window freezes when clicking Cancel during a copy or move operation, my reasons to doubt come from there.

Well, in Windows 7 (on my PC) in 1 out of 3 times the window freezes when clicking Cancel during a copy or move operation, my reasons to doubt come from there. And I'm talking about a Core 2 Duo machine with 4 Gigs of ram.