[SaF] tab key in Microsoft Word

[Katie Andrews]

Every so often, the most annoying thing happens: my tab key won't tab. 
Rather, it acts like some sort of hot key (if I understand the term
correctly) and when pressed, flicks me between my open document and the
Word opening page where I see all my files.  How can I stop this from
happening?  Dammit, I just want to tab! ;)

Thanks and cheers, Katie, who wants to tab, but doesn't drink it with a
capital T ;)