How to Fix Device Manager Not Showing All Devices or Categories Missing on Windows
Device Manager not showing all devices? Device categories missing? USB devices not appearing in Device Manager? Sound or network adapters missing? Hidden devices not displaying? Fix Device Manager missing device issues.
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Main Troubleshooting Guide
How to Fix USB Device Not Recognized →Complete symptoms, causes, and step-by-step solutions
Symptoms
You might be experiencing this problem if you notice:
- •Entire device categories missing from Device Manager
- •USB devices connected but not shown in device list
- •Network adapters category disappeared
- •Sound, video and game controllers section missing
- •Devices work but do not appear in Device Manager
- •Show hidden devices reveals nothing new
Common Causes
- ⚠Device driver class registry keys corrupted
- ⚠Plug and Play service not running properly
- ⚠Device class GUID entries damaged in registry
- ⚠Windows system files corrupted affecting enumeration
- ⚠Group Policy hiding device categories
- ⚠Upper/Lower filter drivers blocking device listing
Solutions
Solution 1: Show Hidden Devices and Scan for Changes
- 1In Device Manager:
- 2View menu → Show hidden devices
- 3Action menu → Scan for hardware changes
- 4Set environment variable to show non-present devices:
- 5CMD as Admin:
- 6set devmgr_show_nonpresent_devices=1
- 7devmgmt.msc
- 8View → Show hidden devices
- 9Check if missing devices appear greyed out
- 10If so, right-click → Update driver or Uninstall and rescan
Solution 2: Fix Plug and Play Service and Drivers
- 1Verify Plug and Play is running:
- 2Win+R → services.msc
- 3Find "Plug and Play" → should be Running/Automatic
- 4Also check "Device Install Service" is running
- 5Reset device drivers:
- 6CMD as Admin:
- 7pnputil /scan-devices
- 8This forces Windows to re-enumerate all devices
- 9If specific category missing, reinstall that driver class:
- 10Download latest drivers from manufacturer website
- 11Run installer — should recreate the category
Solution 3: Repair Registry and System Files
- 1Check for corrupted class keys:
- 2Registry: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class
- 3Each GUID folder represents a device category
- 4Look for UpperFilters and LowerFilters values
- 5If a category is missing, the filter entries may be corrupted
- 6Delete UpperFilters and LowerFilters for affected class (backup first)
- 7Run system file repair:
- 8CMD as Admin:
- 9sfc /scannow
- 10DISM /Online /Cleanup-Image /RestoreHealth
- 11Restart PC — Device Manager should repopulate
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