Windows 10 Windows Features Turn On or Off Blank: Fixing an Empty Optional Features Window

You need to enable a feature such as .NET Framework 3.5, Hyper-V, or Telnet Client, so you open “Turn Windows features on or off.” The window appears, but the list is completely white, or it says “Please wait…” forever. When Windows 10 Windows features turn on or off blank, you cannot add or remove any optional component.

The Windows Features list is built from the component store, the same database Windows Update uses. To fill it, the Windows Modules Installer service must be able to read the store and report every available feature.

If that service is disabled, the component store is damaged, or the store contains broken entries from a failed update, the list stays empty.

Starting the right service and repairing the component slot88 store solves most cases.

Possible Causes

The list stays blank for these reasons:

• The Windows Modules Installer service is disabled or stopped.
• The component store is damaged.
• A failed update left the store in a pending state.
• System files that build the window are corrupted.

A pending restart from an earlier update can also stop the list from loading until you restart.

The Trusted Installer component, shown in services as Windows Modules Installer, is often set to Disabled by optimisation tools because it uses resources during updates. That one change is enough to leave the Windows Features list empty.

Quick Fixes to Try First

Restart and check the service.

1. Restart the PC to finish any pending updates.
2. Press Windows + R, type services.msc, and press Enter.
3. Find Windows Modules Installer, set Startup type to Manual, and select Start.
4. Open Control Panel > Programs > Turn Windows features on or off again.
5. Wait a full minute, since the list can take time to fill.

Signing in with an administrator account matters here as well. Standard accounts may see the window open but cannot load or change the feature list, which can look exactly like a blank window.

Advanced Steps for Stubborn Cases

Repair the component store.

1. Open Command Prompt as administrator.
2. Type DISM /Online /Cleanup-Image /RestoreHealth and press Enter.
3. Type sfc /scannow and press Enter.
4. Restart the PC and open Windows Features again.
5. To see features without the window, type DISM /Online /Get-Features /Format:Table.

You can enable a feature directly with DISM /Online /Enable-Feature /FeatureName:Name, replacing Name with the exact feature from that list.

If DISM reports that the source files could not be found, connect to the internet and run it again, or mount a Windows 10 ISO of the same version and point DISM to it with the /Source option.

Before You Go Further: Keep Your Files Safe

Create a restore point before running repairs or enabling major features like Hyper-V, which can affect other virtualisation software. Let DISM finish without interrupting it.

Conclusion

A blank Windows Features window means the component store or its service is not responding. Start Windows Modules Installer, repair with DISM and SFC, and use DISM commands to manage features if needed.