How to Fix | Sihost.exe Unknown Hard Error Windows 10

Sihost.exe Unknown Hard Error commonly occurs during the shutdown or startup of Windows 10. For many users, the pop up also appears when they attempt to start a certain program. The dialog does not provide any option for dealing with but you can click the close button for a temporary relief.

Sihost.exe Unknown Hard Error message shows up quite frequently which causes different system issues, as 100% disk usage, a slow bootup process or a steady running computer. Before talking about the workarounds, we should know what is this exe error and cause of its occurrence.

Sihost.exe Unknown Hard Error Reasons

1. Faulty or distorted Windows registry keys.

2. Corrupted system files or virus or malicious software.

3. Certain program accidentally or maliciously deleted Sihost.exe.

4. Incomplete or corrupt download of Windows 10 OS leads to the error.

Solution 1. Clean Boot on Your Windows 10

1.Press Windows+ R to open the Run dialog box. Type msconfig into the box and click OK.

2.Go to General on the System Configuration. Click Selective Startup and uncheck the Load startup items.

3.Go to Services and check Hide all Microsoft services, and then click Disable all.

4.Click OK, and then click Restart on the new pop-up dialog box.

Solution 2. Run SFC/Scannow Commandx

To have this error fixed, you can follow the steps below to SFC/Scannow command to detect the broken or missing system files.

1.Press the Windows+S keys to open Search.

2.Type powershell in the search box, and click on Windows PowerShell in the search, choose Run as administrator

3.Type sfc /scannow in the command prompt, and then press Enter.

After you press the Enter button, Windows 10 will automatically scan the system and resolve the broken system files. This process may take you some time.

4.Restart your computer after this process is finished.

Solution 3: Run CHKDSK Command to Check Disk Error

1.Press the Windows+S keys to open Search.

2.Type powershell in the search box, and click on Windows PowerShell in the search, choose Run as administrator

3.Type chkdsk /f /r in the command prompt, and then press Enter.

Then Windows 10 will detect the hard disk and fix disk errors automatically.

4.Restart your computer

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Solution 4: Repair Drivers

If Sihost.exe Unknown Hard Error still persists then fixing all the drivers might be a way out. Any sort of old, absent or incompatible drivers might at times be the reason for these type of PC problems. In this case, you may download any of the professional driver troubleshooters available in the market to even sort out this issue.