Anyway, Vista helpfully asked if I wanted to search for updated drivers that were compatible. However, since Vista disabled my network adapters, no search was possible. Found another computer to work on, but on searching it didn't look like any updated drivers were available.
My workaround was to de-install each of the past package of updates, most of which required restarting. The offending update is KB935280, and Microsoft's discussion of the update is here. Once this update was uninstalled, the drivers for my adaptors started fine, and I re-installed all of the uninstalled updates (except for KB935280, which I'm leaving off until better drivers are available).