Will I encounter problems installing? (Grub, Debian, Windows)

[Gary]

I'm looking at installing Ubuntu 12.04 (64 bit), but I already have Debian and MS Windows installations (dual boot, GRUB bootloader) on the system. I'm quite happy to (actually I would like to) kill off the Debian installation, but need to keep Windows. If I do a standard Ubuntu install will I get problems? If I need to do something special to avoid any problems, what should I do? Thanks in advance.