UAC that you are not familiar with

User Account Control (UAC)—— A feature that has been criticized in Vista. As long as the system changes slightly, it will pop up a dialog box to seek permission from the user, so it has become one of the most hated features in Vista. Also using UAC to judge a program is sometimes complicated. And Microsoft offers only two options for UAC: turn on UAC or turn off UAC, and many users often choose to shut down because they can't stand the pain of UAC. So what changes does UAC have in Windows 7?

Before this article, it is recommended to read an old article "Software Original: How to Secure Computers from Roots, Not Poisoned".

What is UAC?

UAC (User Account Control), Chinese translation for user account control, is a new technology cited by Microsoft in Windows Vista and Windows 7, the main function is to carry out some impact UAC is automatically triggered when the system is safely operated, and can only be executed after the user confirms it. Because most of the malware, Trojans, and ad plugins are like when you enter the computer: copy the files to a directory such as Windows or Program Files, install drivers, install ActiveX, etc., and these operations will trigger UAC, users can be in UAC Prompt to prevent the running of these programs.

The ability to trigger UAC operations includes:

* Modifying Windows Update configuration;

* Adding or deleting user accounts;

* Changing user account types ;

* Change UAC settings;

* Install ActiveX;

* Install or uninstall programs;

* Install device drivers;

* Modify and set parental controls;

* Add or modify the registry;

* Move or copy files to Program Files or Windows directory;

* Access Other user directories

UAC is annoying

Yes, Microsoft has been joining UAC since Windows Vista, which has become one of the criticisms of VISTA, because Vista is not like Win7. The UAC level setting (in fact, Windows 7 UAC is also very annoying), the general configuration of the computer at that time is also very low, so people pop up on this move, but also the guy who locks the screen is very disgusted.

UAC is perfect in Windows 7

Because UAC is too annoying, Microsoft has added UAC's level setting function in Windows 7, which corresponds to 4 levels:

Highest level:

Under the advanced level, “Always notify & rdquo; (that is, fully open), under which users install applications, upgrade software, and in any case Changes to the operating system, changes to Windows settings, etc., will pop up a prompt window (and enable the secure desktop), requesting user confirmation. This shows that this level is the safest level, but it is also the most “trouble” level. It is suitable for multiple people sharing a single computer, restricting other standard users, and prohibiting them from changing system settings at will.

Default Level:

At the default level, the user is only prompted when the application tries to change the computer settings, and the user does not prompt for changes to the Windows settings. At the same time, the secure desktop will be enabled in this mode to prevent system settings from being bypassed by UAC. It can be seen that the default level can not interfere with the normal operation of the user, and can effectively prevent the malicious program from modifying the system settings without the user's knowledge. This level setting can be used by normal users.

A level slightly lower than the default level:

A slightly different level from the default level is that the level will not enable the secure desktop, which means that it is possible to change the system settings by bypassing UAC. . However, in general, if you want to start some programs and you need to modify the system, you can run it directly without any security problems. However, if the user does not run any program but pops up a prompt window, it is possible that the malicious program is trying to modify the system settings, and the selection should be decisively blocked. This level is for users with a certain system experience.

Lowest Level:

The lowest level is to turn off UAC (it must be restarted to take effect). At this level, if you are logged in as an administrator, all operations will run directly without any notification, including modifications made to the system by viruses or Trojans. At this level, viruses or Trojans can connect to other computers on the network or even communicate with computers on the Internet. It can be seen that if UAC is completely turned off and logged in as an administrator, system security will be seriously degraded. In addition, if you log in as a standard user, installing, upgrading, or modifying and setting up the system will be rejected directly without popping up any prompts, and the user will only be able to do so with administrator privileges. It can be seen that UAC is completely turned off and logged in as a standard user. Various operations and settings are also very inconvenient, so it is recommended not to select this level.

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