Get that in the middle of an HA? Don't Fret!
Alt-Tab and start another instance of NF.
Let the autopatch install the data-files.
Login new instance.
Alt Tab
Close old instance
Tab back into new instance.
It takes about 20 seconds less time to do this (If your good with tabbing shortkeys) since it will not overwrite the working Data files and only overwrite the broken one (aka the one windows doesn't see as being opened by navyFIELD.exe)