What is RtHDVCpl.exe and why does it appear in Task Manager?
The RtHDVCpl.exe process is used to configure volume controls if you have Realtek High Definition Audio on your box.
To learn more detailed information about RtHDVCpl.exe, read this post fromMiniToolcarefully.

What Is RtHDVCpl.exe?
RtHDVCpl represents Realtek High Definition Volume Control Panel.
Realtek HD Audio Driver is the interface between the Windows operating system and the Realtek HD audio card.

RtHDVCpl.exe is used to configure volume options.
Is RtHDVCpl.exe Safe?
RtHDVCpl.exe should be run fromC:\Program Files (x86)\Realtek\Audio\HDA\and not from another location.
To confirm, open theTask Manager, go to theDetailstab, right-hit the RtHDVCpl.exe process to chooseOpen file location.
Related post:What Is System 32 Directory and Why You Shouldnt Delete It?
How to Fix Errors Related to RtHDVCpl.exe?
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Then how to fix errors related to RtHDVCpl.exe?
There are two methods offered for you.
Method 1: Update the Audio Driver
Step 1: Right-click theStartbutton to chooseDevice Manager.
Step 2: ExpandSound, video, and game controllers, then right-clickRealtek High Definition Audioto chooseUpdate driver.
Step 3: ChooseSearch automatically for updated driver software, then follow the instructions to update the audio driver.
Step 4: Reboot your box to peek if the error is fixed.
Then running a virus scan may be helpful.
Step 2: ChooseUpdate & Security, go to theWindows Securitytab, then clickVirus & threat protection.
Step 3: ClickScan options, chooseFull scan,and then clickScan now.
And if you meet errors related to RtHDVCpl.exe, try the methods mentioned above to fix them.