Todd Edwin King - 2012-08-02

I haven't seen the following solution to installation errors on Windows 7, so
I provide it here for future reference.

Set the compatablility mode for the installer to "Windows Vista...". I usually
choose the Service Pack 2 variant, but I'm not sure that it matters.

I discovered this by accident, while trying to install MiKTeX on 3 different
Win7 machines. None of the other suggestions I found on this forum were of any
help to me in this instance (e.g., "Run as Admin") - YMMV.