Hi Noel,

Thanks for the input!

That wouldn't have worked for me, because the update patch looks to see if there is a bbw.exe file in the directory you are trying to install the update to (in my case I always use the default c:\bb), if it is not there it will not proceed (fails with an error saying you must install the patch over an existing BIAB installation).

bbw.exe was definitely removed by my initial attempt to install update 519; whatever caused that update to fail also removed bbw.exe. I don't run real time virus check software here.

As I say my main concern is not so much that the update failed, it is the fact that the rollback also failed so I was dead in the water.

Fortunately I always keep the last couple of install drives around in case of emergency smile