Count the situations where the device might need to be "unable to uninstall the device and start the computer"

Author: eviloctal

Such a simple article mainly aims to solve the problem and influence the quality of the article.

When we "detach" some hardware in the "Device Manager", some special situations may occasionally occur, as a result, the system prompts a dialog box such as "unable to uninstall the device and start the computer may need the device". At this time, if we right-click to find the driver installed, we will be helpless.
After this problem occurs, many 2B will say that you can reinstall the driver and overwrite it again. Uncle EO was very responsible and said to you, "it's impossible to play ."
Some other 2B will say that it is okay to uninstall it directly in security mode. Uncle EO is also very responsible and said to you: "This method is useless when EO is trying it out ."
Some other THBS will say that they can be detached directly from the Add/delete program. Uncle EO said angrily: "Why is there so much 2B? This problem is generally caused by the addition and deletion of wood in the program. I rely on it ."
What should we do? What should I do?
Two methods.

First, when we replace the NIC or blind J8 unmount the NIC without detaching the driver, if the "unable to uninstall the device to start the computer may need this device" dialog box appears when you uninstall the driver, please refer to the following cases (this case is for plagiarism thanks to the plagiarized blog "my blog data Park "):
Mr. Liu recently used the Windows xp sp * system. Some problems have occurred after a new Nic is installed. When setting the IP address, a dialog box is displayed, "the IP address you entered for this network adapter has been assigned to another adapter ". Mr. Liu is a "J8 hacker". In this case, the Device Manager immediately sets a hidden device. Choose Device Manager> View> display hidden devices. I found that the original NIC Driver is still there, my day. Although there is no physical interface card, but the system still uses this driver, IPResourcesThe device is also in use. When you manually uninstall the device, it cannot be detached. This device may be required when you start the computer ".
It cannot be uninstalled in security mode.
Mr. Liu was not convinced and opened the Registry again. He found two NICs in the computer in HKEY_LOCAL_MACHINESYSTEMControlSet001Services. He deleted the primary keys and subkeys of the old NICs and left only the key values of the existing NICs. Press F5 to refresh and return to the Device Manager. The old Nic is still in use, and it does not work again.

In fact, there are two solutions to this problem:
1. Temporary: run the "set devmgr_show_nonpresent_devices = 1" command in cmd. Then run the command devmgmt. msc to open the Device Manager and select Show Hidden devices to find the NIC. The two commands must be completed in the same cmd window.
2. Permanent: My computer, attribute, advanced, new devmgr_show_nonpresent_devices in system variables, value 1, OK.
After you open the Device Manager, you can select a hidden device to display the device that is not connected or unmounted.

Second, if the system displays an exception because the video card driver is installed, the processing method cannot be as follows.
Miss Cheng is also a J8 hacker, female? That's right, female. She installed the display card (both Nvidia) on different machines for different people. The system was just installed and the display card driver was automatically installed, view the display properties. All parameters are displayed. When the driver is updated with the easy-to-use driver, the Device Manager prompts that the driver has a yellow exclamation mark.
Miss Cheng used the same method as Mr. Liu, and there was no way to do this. Even the solution that Mr. Liu used was useful.

In fact, the solution to this problem is very simple. Right-click the video card driver, select "properties" in the pop-up menu, and then select the driver tab.
Then follow the steps shown in the figure.


If this is not the case, there is no good way for the moment. I want to update the "trotters ".