It would really improve UAC if it had some "smarts".   Once a user explicitly
approves a privilege elevation, especially if a password is typed in, the
security mechanism should automatically elevate subsequent requests
automatically, i.e. not prompt the user.  

I am primarily a Windows user but have worked with Mac OS X and Linux and
this is consistent with their approach.  I am a developer.  I have worked for
Symantec and other security firms in the past.

It could be a checkbox on the prompt (default off), that inhibits UAC prompt
for 5 minutes or so and automatically elevates permissions (doesn't leave
permissions elevated, they return to user mode but elevates when needed)

If it is possible to determine "related" requests (e.g. for a particular
install) there could be an option for elevating all requests or just
"related" requests.

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