I don't know why it would be the OS, all was fine until a few days ago . As for programs i've added - itunes limewire oblivion LOTRO. I done a system restore to the point where it was all well but it stil persisted. Rep+ to all who have helped so far.
Did you say Limewire? Oh noes, Limewire borked a friends comp up once.
Limewire was the only thing he added.