Is there any reinstallation system, such as windouws7? In the process of using windows7, there are often softwares that can't run normally without administrator authority (some softwares can't be opened directly, and some softwares can't run normally (for example, keil can't register successfully without administrator authority)) ... Maybe you will say that my computer has only one user, and this user should be an administrator! You can't. If you enter the user name where you enter the user information when installing windows7 system, you have created a new individual user, but the user is not an administrator. The real manager is the manager. The following methods can obtain administrator rights of windows7.
Right-click "Computer" and select "Manage". There is a "Local Users and Groups". Then right-click Administrator to turn off disabling. This is an administrator with full permissions, and then switch to the administrator user at the shutdown place to delete other users (the information deleted at the desktop and other places in this user will be prompted to save). Only in this way can you fully operate your computer.