Fixing file previews

If, like me, you have Windows 7 (or Vista) 64 bit installed, you may have noticed an annoying glitch – whilst the file previews are much better than they ever were in XP, they can’t quite manage PDFs. You get a funky message in fact:

This file cannot be previewed because of an error with the following previewer: PDF Preview Handler for Vista To open this file in its own program, double-click it.