I also get the same error code 4397 again and again and again.. as Windows
Update tries to make the "important"update KB956500 to my PowerPoint viewer
2003. I have Microsoft PowerPoint Viewer 2003 on my computer. I am running
Windows Vista Home Premium.
The first Update failure I can see in the Windows Update history was on 15
August 2008. There were a whole bunch of updates that day including
KB951072, KB951618, KB952287 Updates for Windows Vista.
The Windows Update error message has the following explanation underneath
4397:
"Windows can't update important files and services while the system is using
them. Save any open files and then restart the computer."
I don't have nay programs running when I try to do the update manually.
When the system tries to update automatically it does so when my computer is
shutting down.