PC slow motion audio and video

Question

PC slow motion audio and video

lel0001 5

My PC only runs videos in slow motion, and all sounds too, I checked the task manager but everything seems fine, no GPU, CPU or RAM excessive usage, it started this morning and I have no idea what it could be. I tried using multiple browsers but the issue is still there, so it's not related to that.

wayne thompson 20 Reputation points

2026-02-28T05:12:12.08+00:00

Hope this helps spent 3 hrs trying to figure this out, I muted the sound and video was normal on you tube then tried a normal movie and played up while muted, I have a jbl quantum 810 headset and plugged in a standard headset and it worked then plugged in jbl again all drivers updated already and it worked.

What a nightmare thought I needed a new part for pc
Deleted

This comment has been deleted due to a violation of our Code of Conduct. The comment was manually reported or identified through automated detection before action was taken. Please refer to our Code of Conduct for more information.
Marcell Le 5 Reputation points

2026-02-28T13:37:52.7166667+00:00

Hi, could you please specify a bit more how you fixed your issue? I also have JBL headset and im having the same issues as you
wayne thompson 20 Reputation points

2026-02-28T21:46:09.0833333+00:00

I pretty much just used another headset wired which had a mic input jack and headset jack on front of my computer once connected it fixed it then plugged my jbl back in afterwards and it worked again
Matthew Mckenzie 15 Reputation points

2026-03-07T00:06:13.5166667+00:00

i have a JBL quantum and everything was fine then i installed the quantum engine and everything was good for a bit but then it all went into slomo so searched for known problems then saw this thread and i uninstalled the quantum engine for JBL headsets and it fixed it instantly if you have a JBL that might help you Wayne was spot on cheers pal. switching to a cabled headset or gaming earphone works as well so something else to consider.
Caio Gobbi 0 Reputation points

2026-03-08T21:40:11.96+00:00

Last week this first solution (plugging in a standard headset and then plugging the jbl again) worked. But today the problem happened again and this hasn't worked, so I tried the second solution (unninstalling the JBL Quantum Engine) and it worked instantly
Ng Zhin Loong 5 Reputation points

2026-03-12T06:47:01.9366667+00:00

I'm using JBL Quantum One and have the same issue. But I fixed it by uninstall Quantum Engine software and download a latest update software and it worked. For me it's the Quantum Engine software messed it up. So try reinstall Quantum Engine instead of update the existing installed software. Hope it helps, Cheers.
lel0001 5 Reputation points

2026-09-16T21:54:26.0466667+00:00

From what I am aware this issue only happens with the JBL QuantumENGINE software, when the auto start setting is enabled, thats when this issue appeared, i disabled it and from now on it hasn't happened again.

4 answers

Your answer

wayne thompson 20 Reputation points

2026-02-28T05:12:12.08+00:00

Hope this helps spent 3 hrs trying to figure this out, I muted the sound and video was normal on you tube then tried a normal movie and played up while muted, I have a jbl quantum 810 headset and plugged in a standard headset and it worked then plugged in jbl again all drivers updated already and it worked.

What a nightmare thought I needed a new part for pc
Deleted

This comment has been deleted due to a violation of our Code of Conduct. The comment was manually reported or identified through automated detection before action was taken. Please refer to our Code of Conduct for more information.
Marcell Le 5 Reputation points

2026-02-28T13:37:52.7166667+00:00

Hi, could you please specify a bit more how you fixed your issue? I also have JBL headset and im having the same issues as you
wayne thompson 20 Reputation points

2026-02-28T21:46:09.0833333+00:00

I pretty much just used another headset wired which had a mic input jack and headset jack on front of my computer once connected it fixed it then plugged my jbl back in afterwards and it worked again
Matthew Mckenzie 15 Reputation points

2026-03-07T00:06:13.5166667+00:00

i have a JBL quantum and everything was fine then i installed the quantum engine and everything was good for a bit but then it all went into slomo so searched for known problems then saw this thread and i uninstalled the quantum engine for JBL headsets and it fixed it instantly if you have a JBL that might help you Wayne was spot on cheers pal. switching to a cabled headset or gaming earphone works as well so something else to consider.
Caio Gobbi 0 Reputation points

2026-03-08T21:40:11.96+00:00

Last week this first solution (plugging in a standard headset and then plugging the jbl again) worked. But today the problem happened again and this hasn't worked, so I tried the second solution (unninstalling the JBL Quantum Engine) and it worked instantly
Ng Zhin Loong 5 Reputation points

2026-03-12T06:47:01.9366667+00:00

I'm using JBL Quantum One and have the same issue. But I fixed it by uninstall Quantum Engine software and download a latest update software and it worked. For me it's the Quantum Engine software messed it up. So try reinstall Quantum Engine instead of update the existing installed software. Hope it helps, Cheers.
lel0001 5 Reputation points

2026-09-16T21:54:26.0466667+00:00

From what I am aware this issue only happens with the JBL QuantumENGINE software, when the auto start setting is enabled, thats when this issue appeared, i disabled it and from now on it hasn't happened again.

Answer 1

If your PC is experiencing slow motion audio and video playback, it could be related to several factors, including issues with drivers or system performance. Here are some potential causes and solutions:

Driver Issues: Sometimes, audio and video playback problems can stem from outdated or incompatible drivers. Ensure that your graphics and audio drivers are up to date. You can check for updates through Windows Update or the manufacturer's website.
Long Running Interrupt Service Routines (ISR) and Deferred Procedure Calls (DPC): These can cause delays in the audio engine, leading to playback issues. If there are long-running ISRs or DPCs, they may affect media performance. You might want to analyze your system for any such issues.
Client Side Starvation: This occurs when the source cannot read from the disk or network fast enough to keep up with real-time decoding and rendering. Check if your disk is under heavy load, which might cause the playback to lag.
Performance Assessment: You can run a performance assessment to check for any underlying issues that might be affecting your system's ability to play audio and video smoothly. This can help identify if there are any bottlenecks in your system.
System Resources: Even if Task Manager shows that CPU, GPU, and RAM usage are normal, other background processes could still be affecting performance. Try closing unnecessary applications or processes to see if that improves playback.

If the problem persists after trying these solutions, consider performing a clean boot to see if a startup program is causing the issue.

References:

Answer 2

Ivan B 124K Independent Advisor

Hii,

Open the command prompt (admin) and run the commands: sfc /scannow and dism /online /cleanup-image /restorehealth, wait for the process to finish and restart the computer.

Then perform a clean boot and if you want to uninstall applications that you do not use.

https://support.microsoft.com/en-us/topic/how-to-execute-a-simple-boot-start-in-windows-da2f9573-6eec-00ad-2f8a-a97a1807f3dd

Download Lantecy Mon for free, take a screenshot and post it here, see if there is a high Lantecy driver and take a screenshot and post it here

If it is a laptop or desktop, if possible, could you provide the laptop model or your desktop configuration?

Thanks

lel0001 5 Reputation points

2026-02-18T22:20:24.3633333+00:00

It is a desktop PC I built myself, i tried booting into safe mode (with internet enabled) and everything was perfect, here is the latency mon screenshot, you should note that my pc is high end, so there shouldnt be any hardware issues.
Ivan B 124K Reputation points Independent Advisor

2026-02-18T22:30:38.02+00:00

Hi,

It's possible the driver issue is a problem. Remove all peripherals except the mouse and keyboard.

Follow the procedure I sent earlier and let me know your desktop configuration.

Thanks
lel0001 5 Reputation points

2026-02-18T22:49:23.4033333+00:00

My desktop configuration is as follows:

CPU: AMD Ryzen 9 7950X 16-Core Processor (4.50GHz)

RAM: Corsair Vengeance DDR5 6000MHz 32GB 2x16GB CL30 RAM Memory AMD EXPO and Intel XMP Dual Memory

GPU: MERC 310 XFX Radeon RX 7900 XT

Storage: 2x KINGSTON SNV2S1000G

Motherboard: ASRock B650M Pro RS WiFi Micro ATX AM5 Motherboard

OS: Windows 11 Pro (x64)
Ivan B 124K Reputation points Independent Advisor

2026-02-18T23:29:18.1166667+00:00
Hi,

In this case, you'll use DDU to remove the audio driver and AMD Cleanup Utility. According to Latencymon, the audio driver is experiencing high latency. I recommend updating the BIOS, however, there are risks involved. Canceling the BIOS update could render your PC unusable.

First, you need to disable BitLocker: https://www.asus.com/support/faq/1047461/

Then you'll update the BIOS: https://www.asrock.com/mb/amd/b650m%20pro%20rs%20wifi/index.asp#BIOS

BIOS update procedure: https://www.asrock.com/support/BIOSIG.asp?cat=BIOS10

Open the command prompt (admin) and run the command: net user administrator /active:yes. If the operation is successful, you will use AMD Cleanup Utility and restart in safe mode. Access the local administrator account.

It will ask you to remove the drivers; press yes and then wait. Remove the driver. After removing it, it will restart. Windows will start. You can use DDU to remove the Realtek audio driver.

You can use DDU: https://www.guru3d.com/download/display-driver-uninstaller-download/

Note: DDU is a third-party application to completely delete and reinstall the GPU driver.

After downloading, extract DDU to a folder.

Run the driver screen uninstaller.exe application, select the Model tab, and put Audio. After uninstalling the Sound Driver, uninstall it for Realtek.

Click on the first option, "Clean and reboot," and wait for the process to finish.

After running DDU and install driver :

https://www.asrock.com/mb/amd/b650m%20pro%20rs%20wifi/index.asp#Download

Realtek high definition audio driver ver:6.0.9468.1_Nahimic

AMD chipset driver ver:7.09.23.2230

Nahimic3 utility ver:1.10.7_APO4

Video driver: https://www.amd.com/en/support/downloads/drivers.html/graphics/radeon-rx/radeon-rx-7000-series/amd-radeon-rx-7900-xtx.html

Open the command prompt (admin) and run the commands: sfc /scannow and dism /online /cleanup-image /restorehealth, wait for the process to finish and restart the computer.

Then perform a clean boot and if you want to uninstall applications that you do not use.

https://support.microsoft.com/en-us/topic/how-to-execute-a-simple-boot-start-in-windows-da2f9573-6eec-00ad-2f8a-a97a1807f3dd

Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

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Thanks
lel0001 5 Reputation points

2026-02-19T18:00:55.3366667+00:00

I am unable to update the bios on my B650 Pro RS WiFi motherboard from 2.10 to 4.03. Every time I try proceeding with the instant flash tool the updating pop up shows but before it even goes to 1% my PC resets, when I go back into the bios it is still on 2.10, I have used the FAT32 format on the USB drive and extracted the .ROM file into the USB. Any clue to what could be happening?
Ivan B 124K Reputation points Independent Advisor

2026-02-19T18:35:44.94+00:00

Hi,

In this case, testing with another flash drive only confirms the possibility of a hardware issue, demonstrating that the audio driver failure is causing high latency.

In this case, the only remaining problem is that you can't update your motherboard; some users are having problems with motherboards using 9000 series processors, I don't know about the 7000 series.

https://www.reddit.com/r/ASRock/comments/1n007rl/regarding_the_cpu_failures_from_7000series/

https://www.reddit.com/r/ASRock/comments/1p2ypdo/is_the_7000_series_safe/

What I recommend, if it's under warranty, is to claim on it or try checking the component separately.

Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

Thanks

Answer 3

Hi lel0001,
Welcome to Microsoft Q&A forum. I'm happy to help.

Your problem might be caused by audio drivers. Please navigate to your motherboard support page to download and install audio drivers for your computer.

If you have Realtek Audio chipset, you may use DDU to completely clean up old Realtek Audio drivers before installing new one. It's best to run DDU on Safe Mode.

Disclaimer: Microsoft provides no assurances and/or warranties, implied or otherwise, and is not responsible for the information you receive from the third-party linked sites or any support related to technology.

After that, press the combination Windows + R > insert mmsys.cpl > OK > double-click on your output device > Advanced tab > change Default Format to another one to see if the problem can be solved.

I hope that above information is helpful to you.

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

Lucus-V 13,125 Reputation points Microsoft External Staff Moderator

2026-02-25T17:29:42.8366667+00:00

Hi lel0001,
I hope everything is going well on your end. Just wanted to check in and see how things are going for you lately, anything you'd like to share or discuss?

Answer 4

lel0001 5

From what I am aware this issue only happens with the JBL QuantumENGINE software, when the auto start setting is enabled, thats when this issue appeared, i disabled it and from now on it hasn't happened again.

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