Have you ever found out that the Device Manager does not display all devices? If you need, you could see these ways:
Registry Way:
This method needs you to do some changes in your registry. Due to the fact that the registry is the heart and soul of your system, we suggest advanced PC user apply this way. Before doing the changes, please firstly crate a full registry backup to avoid any mistakes.
Please follow the steps to show all devices in Device Manager.
1. Click on Start and then click on Run. Type in regedit to launch Registry.
2. Find out HKEY_LOCAL_MACHINE from the registry editor. Click the cross on the left side of the folder to expand. Expand the folder until you see SOFTWARE folder.
3. Expand the folder until you see CurrentControlSet folder.
4. Expand the folder until you see Control folder.
5. Expand the folder until you see Session Manager folder.
6. Expand the folder until you see Environment folder.
7. Find out DEVMGR_SHOW_NONPRESENT_DEVICES. If so, go to step nine. If you can’t, create the value using the following steps.
a. Right click on the right hand side of the registry editor.
b. Select New and then go to String Value.
c. Rename the new String Value
Find out DEVMGR_SHOW_NONPRESENT_DEVICES. You can also right click on the new string value that comes up and select Rename.
8. Double click on DEVMGR_SHOW_NONPRESENT_DEVICES. A new box appears to let you modify.
9. In Value Data, type 1 if you want to show all devices. Type 0 if you want to hide devices. Click OK.
10. Exit the registry and restart your PC.
System Way:
If you are an advanced user and you want to be able to view devices that are not connected to your computer, set this environment variable globally. To do so, perform the following steps:
1. Right-click My Computer.
2. Click Properties.
3. Click the Advanced tab.
4. Click the Environment Variables tab.
5. Set the variables in the System Variables box.
Another way:
1. Click Start, and then go to All Programs, select Accessories, and then go to Command Prompt.
2. At a command prompt, type in set devmgr_show_nonpresent_devices=1, press ENTER.
3. Type in start devmgmt.msc, press ENTER:
4. Troubleshoot the devices and drivers in Device Manager.
5. When you finish troubleshooting, close Device Manager.
6. Type exit at the command prompt.
