I have a relatively clean Vista x64 RTM (clean install, not upgrade) system
with 3Gb ram & ~700Gb disk abd a dual core PD 820.

I tried to install office Ultimate 2007 (default install option) only to be
met with the installer failing, and raising a popup

Error 1310.Error writing to file c:\config.msi\473dda.rbf. Verify that you
have access to that directory.

I have tried running the install as administrator in standard & priviliged
mode (UAC is enabled).

Other progs have been installing fine.

Suggestions on next step? Known issue?