It is so frustrating as it prevents users from accessing detailed Service Properties and configurations.
If you also find Services.msc Extended tab is blank, you may try the following methods for troubleshooting.
Step 1: TypeCommand PromptinSearchand chooseRun as administrator.
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Step 2: Then execute the following two commands one by one.
When they finish, quit the window and restart the Services app.
see if the Extended tab of Services.msc has been restored.
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To do that, it’s possible for you to follow this guide.
Step 1: Run Command Prompt in Search and choose Run as administrator.
Step 2: Typesfc /scannowin the elevated Command Prompt window and pressEnterto execute it.

Then wait for a while until the process finishes and then test whether the disappearing services come back.
Step 2: Copy and paste this path into the address bar and pressEnterto locate it.
Alternatively, you might follow this path from the left pane to locate the destination.

you could attempt to scan your system via somesecurity software.
Step 1: OpenSettingsby pressingWin + Iand chooseUpdate & Security.
Step 2: In theWindows Securitytab, clickVirus & threat protection.
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Step 3: ChooseScan options > Microsoft Defender Offline scan > Scan now.
you could perform regular backups with available backup schemes, such as incremental or differential backups.
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Step 1: OpenSettingsand clickUpdate & Security.
Step 2: Go to theRecoverytab and clickGet startedunderReset this PC.
Then you’re able to follow the next on-screen instructions to finish the work.
Bottom Line
How to fix the Services.msc Extended tab is blank issue?
Try the above methods one by one and some of them may resolve your concerns.