Thanks, Macropod, much appreciated.

Actually that would make a lot of sense if it were Trojan-related, my hotmail got hacked for the first time ever in February and when I looked at the install date for 2007 (as I was uninstalling it), it said February. I ran a full scan at the time and, after a few password changes, thought I'd cleared everything up, but maybe not...

I reinstalled 2010 and then uninstalled 2007 (imagining it would just default to using 2010 instead of this silly trial 2007) - why, is there a significance to doing one before the other?

Am pretty sure I was going slightly mad anyway..!