Vista - Windows update error 80070011, all recent updates except defender

Hi, I'm using Windows Vista Business 32-bit. I have 6 updates that
always fail to install, each one complaining of error 80070011.

A bit of googling gives me this info:
winerror.hI have a multiple partition setup:

C drive, Vista system, 20GB NTFS
D drive, Win2k system, 4GB NTFS
E drive, Apps + Data partition, rest of disk (300 or so GB)

All partitions have lots of space.

I do have Program Files / Common Files junctioned off to E drive, and
HKLM > SOFTWARE > MS > WINDOWS > CURRENTVERSION entries for those
folders pointing in the correct places on E drive, but I have tried
taking all this apart and having the right files on C drive and registry
entries back to their defaults but the error persists.

The Windows Defender updates always install successfully though,
regardless of Program Files / Common Files pointing to E:.

I have used this type of setup on Windows 2000 and XP for years without
problems like this. Any ideas what I can do to resolve it, short of
blowing away the whole installation and starting again?

Problem sorted. After a few tests with a test install of Vista on
another machine, I found that even if C:\Program Files is set up as an
NTFS junction to wherever you want your Program Files folder (a tactic
I've used for years on Win2k/XP without problems), Windows Vista updates
still screw up.

I've implemented the changes on the machine I was having problems on, no
problems anymore.

For the meantime ('meantime' being, if MS fix this problem), I'll have
to put up with changing the path to my preferred apps folder when I
install programs, and C:\Program Files contains the folders that come
with a Vista installation, as well as the contents of Common Files.