It's legitimate if it lives in C:\Windows\System32\DriverStore\FileRepository and is signed by Realtek. Leave it enabled for jack detection and Realtek features. If it errors or uses CPU, reinstall the Realtek driver from your PC maker.

What RtkAudUService64 actually means

Modern Realtek drivers are split into a core driver plus a separate service and app (Realtek Audio Console). RtkAudUService64 lets the console and driver talk to each other, detects plugged-in headphones, and applies effects.

Disabling it in Startup apps saves almost nothing and can stop headphone detection or speaker settings from working.

Signs of the problem

  • “Realtek HD Audio Universal Service” in Startup apps or Task Manager.
  • Errors mentioning RtkAudUService64.exe at startup.
  • Occasional CPU use from the service.

Why RtkAudUService64 happens

  • Normal part of the Realtek audio driver.
  • Mismatched driver and console versions causing errors.
  • Corrupted driver install.

Fixes to try, in order

  1. Check it's genuineTask Manager → right-click → Open file location; it should be in the DriverStore folder and signed by Realtek.
  2. Keep it enabledLeave it on in Startup apps if you use headphones or the Realtek console.
  3. Fix errors by reinstallingUninstall the Realtek audio device in Device Manager (tick delete driver), restart, then install the latest audio driver from your PC or motherboard maker.
  4. Update Realtek Audio ConsoleGet it from the Microsoft Store or the PC maker so versions match.
How to confirm the fix: No startup errors, and headphones are detected when plugged in.

Prevent it from coming back

Install audio drivers from the PC maker rather than generic packs.