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My notebook Y470(win7 Home Edition) has a yellow exclamation mark after connecting to wifi in Shenzhen Longgang Library! Ask for an answer! ! ! ! !
Permission problem! Let me tell you something.

Log in to windows7 system as superuser, and add right-click administrator to gain ownership;

1, logging in windows7 with super user vista is the same as win7. After installing the system, users are built and administrators are disabled. Some optimized systems usually log in directly as an administrator. Although it is the right of the administrator, there are still many restrictions. The most common thing is that sometimes you need to right-click "run with administrator authority", which is quite troublesome, but obviously you can't upgrade your authority, so I thought of this super administrator user activation method:

A. press "win logo key +R", enter lusrmgr.msc, and confirm.

B click "user" in the pop-up window, double-click "administrator" on the right, remove the check mark before "account disabled", and click ok.

C. cancellation. If only your own users are displayed, press "Ctrl+Alt+Delete" and log in as an administrator user. By default, the password is empty.

Ok, now you are logged in as an administrator user with all permissions.