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I have a password protected admin account which is not used itself, it was created for a security reasons. Practically my computer is used with a second password protected standard user account. When I'm trying to execute some task which require admin rights, I receive an UAC prompt where I have to enter the admin password. Problem is that I still can run task manager without an UAC prompt, which is seems incorrect because the UAC level is the highest possible and the account have no administrator rights, I also think is't bad for system security. Can I fix it?

  • If you want to disable task manager then disable it through the applicable group policy – Ramhound Dec 17 '17 at 1:44
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    Why do you believe that the ability to run Task Manager is a security concern? Can you use it to terminate processes that aren’t running under your (non-privileged) account?  Can you use it to see processes that aren’t running under your account? – G-Man Dec 17 '17 at 1:45
  • As @G-Man says, running Task Manager from a non-privileged account only gives access to tasks belonging to hat account. – Blackwood Dec 17 '17 at 2:00
  • @G-Man, if a malware somehow get into my system, can it run taskmgr.exe and then do some malicious actions through it, such as shutting down important processes or creating a new task such as running .bat file which won't let my system load the next time I turn on the computer? – Andre Dec 17 '17 at 11:54
  • no, as I wrote the malware can run taskmanager only with standard rights, so it can't close processes running as admin or stop services. – magicandre1981 Dec 17 '17 at 17:37
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You don't understand what highestAvailable means.

highestAvailable means the application gets the highest privileges according to its group membership, so it will elevate (UAC dialog) if the current user is a part of the administrator group. When a standard user runs the process, no UAC dialog is shown and the process runs with the standard permissions and displays less data. This is what you see.

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