Installation is blocked by policy

Useful keyboard to plug into the computer, display: Installation is blocked by policy
　
Own solution
1. Click the Start menu (or use the "win+r" key) → type "gpedit.msc" to enter.
2. Expand: Computer configuration → administrative panel → system → device installation → device installation restrictions.
3. Double-click the "Prohibit installation of devices not described by other policy settings" on the right-hand side → select "Disabled".
4. Uninstall this unrecognized drive, reboot the system, unplug the keyboard and plug it in again.

Online looking for a spare
Reprint Address https://zhidao.baidu.com/question/324706351
Install USB drive is policy block my USB stick plug into the computer eject driver installation results say "installation is blocked by policy"
1. In WINDOWS Explorer, go to the "system disk: \Windows\Inf" directory, locate the file named "USBSTOR.PNF", right click on the file, select "Properties" in the pop-up menu, then switch to "Security" tab, "group or user name" box, select the user group you want to disable, and then, in the Permissions box for the user group, tick the Allow check box after Full Control, and finally click the OK button.
2. If you cannot do the above, prove that your current user is not a computer administrator, do not have permission to change the file security policy, but also do not have permission to install the USB driver. Upgrade your account to a computer administrator. It's all right.

Unable to find usbstor.pnf "file T. T
In the Folder Options view, the "Show hidden Files" tick, the "Do not show the system files" and "Use thin sharing mode" Check out, then go to find, manually found, you can copy the file name after the "search" to find, the search scope is set to the system disk, if not found, prove that your system lost this file, Send a friend from the internet to you, put it to me to say
Above the folder mentioned above, and then according to the previous method to change the security policy of this file, restart the installation of USB driver

On the internet to find a spare two
Reprint Address https://jingyan.baidu.com/article/948f5924333e00d80ff5f9f7.html
The workaround that this program is blocked by Group Policy is displayed when the software is installed
1. After installing the system, the installation software shows that this program is blocked by Group Policy. For more information, contact your system administrator. What's going on, how to fix it?
2, Group Policy How to disable the installation of software
The software is not installed properly due to Group Policy setup issues. How to solve this problem.

Start-run (enter gpedit.msc)-OK or enter to open the local Group Policy editor;
Left-click: Computer Configuration-Administrative Template deployment;
Found in the expansion entry for Administrative Templates: Windows Installer, and left-click: Windows Installer;
In Windows Installer corresponding to the right window, locate disable Windows Installer, and left-click: Disable Windows Installer;
In the Open Disable Windows Installer window, we select Enabled and select in the Options box: Never, then click: Apply-OK, exit the Local Group Policy editor;
Notice what's inside the Help box:
Never: Indicates that Windows Setup is fully enabled. Users can install and upgrade the software.
For unmanaged applications only: Allows users to install programs assigned by the system administrator (provided on the desktop) or published (added to add or Remove Programs).
Always disabled: Indicates that Windows Setup is disabled.