Argh, this keeps happening to my dad (and me on occasion).
Vista just decides (seemingly, pretty sure I’m not doing the keystroke combo) to change the keyboard language from the default setting of US English to Canadian French (thus I get e’s with accents, etc. – seriously, those are as lame as Poutine! ๐
Anyways, the fix is the Left ALT+Shift…
Alternatively, to see this changing happening, go into the control panel and choose Regional and Language Options. Then Keyboards and Languages and press the Change Keyboards button. I found the most useful was to have the language bar docked in the taskbar” and the checkbox for “show text labels on the lanaguage bar” checked.
Dad, are you reading this? ๐