There is a brand new worldwide symptom affecting MANY MANY Win7 users, involving as its primary symptom the inability to shut down or restart Win7 due to requiring "administrator permission".
If you do a google search for "Error - You don't have permission to shut-down this computer " you will discover that many people (but not everybody) using win7 have suddenly been struck by the symptom.
The "fix" (at least for the main symptom of not being able to shut down or restart) involves a very simple GPEDIT tweak, has now been published on all of the big main web sites, and was originally provided on this site.
I have replied on this related thread over on SevenForums, where discusion of the topic has now also begun. I mentioned that I thought it might be something newly pushed out by BitDefender which could be responsible (since it suddenly yesterday affected BOTH of my own Win7 machines, both of which run BitDefender), but I'm not sure. The original poster of the SevenForums thread mentioned that he, too, runs BitDefender... hence my elevated suspicion now that it might be from BitDefender and not from Microsoft, that this new symprom has arisen.
In addition to the inability to shutdown (at least until you apply the "fix" through that GPEDIT recipe) there are some new non-fatal non-critical (but very annoying) new symptoms, regarding progams no longer able to run properly, or access or save data, or access the Registry, etc., all of which depend on UAC or administrator authority which no longer seems to be behaving as it used to.
For example, now even with UAC level set to "zero" it looks like it might now be "partially alive", preventing things from behaving as they always have been before... now seeming to require adminstrator authority to complete. I now get prompts when doing MOVE or DELETE for files (advising that permission is needed from administrator) which I can simply reply OK to (since I AM the administrator, and I HAVE APPLIED THE GPEDIT FIX) and the operation completes. I never got this prompt or had to reply OK before now.
Also, some programs (like Clockwise from Inbit) now require to be "run as administrator" in order to run properly, otherwise they fail or produce mystical errors. This was never true over the past 20 years of my using Clockwise... but now is, in order for it to access the Registry where it saves its settings.
So I ask... has something from BitDefender been pushed out in the past day or two, which could affect UAC in Win7??? Sure looks suspicious. That "partially alive UAC" description seems very very suspiciously similar to "partially active BitDefender Firewall", even when you SWITCH OFF FIREWALL in Protection. The only way you can be sure about problems that might be caused by BitDefender Firewall is to COMPLETELY UNINSTALL BITDEFENDER and re-test. There is no "turn off Firewall completely" that is accomplished even when you un-check that switch (although obviously there should be), and temporarily uninstalling the product is the only way to investigate whether or not Firewall is causing a symptom (and then reinstalling after the test is complete).
I may uninstall BitDefender on one machine to see if the new "UAC partially alive" symptom is still present or not. Note that I have UAC set to "zero", and have never been bothered with prompts about needing administrator permission... until this new worldwide symptom. So it's either something from Microsoft, or something from BitDefender, which is responsible.
Anybody else see this?