High-end units with HDMI ARC (Audio Return Channel) can enter a logic loop where the TV and receiver constantly renegotiate, exhausting the DSP’s memory → error 087.
Update GPU drivers via Device Manager or manufacturer tools. Reset network services (Plug and Play, Telephony). Software Conflict Execute the task in Safe Mode with Networking. waaa087 fixed
How to fix another installer is currently running error ( Error code: 87) High-end units with HDMI ARC (Audio Return Channel)