Windows 10: audio and performance issues after install of kb4556799

I have been having audio and performance issues at startup since installing the latest may cumulative update for windows 10 1909.


the issue i was having with the May update was broken up audio at startup when the startup sound was playing. it sounded like the system load was so heavy it could npt play the sound properly. I have an i7-8750H, so I find it hard to believe that this was the case. after login, the issue continues for about five minutes or so, as the startup programs load. the system performance overall seemed to be reduced and the clock speeds on my CPU never fell below 2.90Ghz, even when the CPU was idle. the reduced performance was most evident during windows boot. normally it is almost instant to go from turning on the system and being able to log into windows, but after the may update, I would have to wait about 45 seconds to a minute before the login screen came up. and that if windows booted properly at all. I noticed that after the may update, if i told windows to restart from the start menu, windows would try and reboot, but get stuck on the windows logo screen. there would be no drive activity at all, it would just sit there. this would continue until the startup recovery mode got triggered, and then if you chose th continue to windows 10 option, windows would boot properly. I am pretty sure the issue with the not restarting properly is something to do with the hibernate part of the fast startup. for what ever reason the system was not processing the saved data that is used during normal 'fast' startup. I did try and disabling fast startup, and the issue went away. my system fully supports fast startup, so the issue lies not with the hardware, but with the software i.e. the may update.


uninstalling the update once, resolved the issues, but when the update got reinstalled, for what ever reason, I was unable to reinstall it afterwards. I ended up doing a repair install of windows 10, which took me back to 18363.418, but as soon as windows updates got going, it wanted to reinstall the troublesome update. is it still possible to get the previous cumulative update through windows update? I have already hidden the may update by using the hide windows update troubleshooter provided by Microsoft. or will I be forced to get the previous April update through the windows update catalog?

:)

 

KB4556799 issue and bugs

I have installed KB4556799 on more than half a dozen machines, various makes and models, some x86, others x64. None have had any issues whatsoever.

Microsoft have also read the same reports that you have. They don't seem to be able to verify these reported issues. If anyone has such issues, then MS are asking them to provide feedback...

KB4556799 CU Win 10 v1903 build 18362.836 and v1909 build 18363.836

 

Audio not working

Hi Mirdula,

Before we proceed, I would like you to provide the information stated below:

• Did you make any changes to the PC prior to this issue?
• What troubleshooting steps have you performed to fix the issue?

For now, I suggest that you refer to the article, Windows 10 – Audio Troubleshooting Tips
and check if the steps provided helps rectify the issue.

Hope this helps

Regards

 

Audio and Performance Issues

Hi,

Thank you for posting your query in Microsoft Community.

I understand your concern, however I suggest you to install all the pending Windows update, including the latest sound drivers from the manufacturer’s website and check if that helps.

Also perform clean boot by following the steps from the link below and check if the issue is resolved. Placing your system in Clean Boot state helps in identifying if any third party applications or startup items are causing the issue.

You need to follow the steps from the article mentioned below to perform a Clean Boot.

How to perform a clean boot in Windows

Note:
After clean boot troubleshooting step, follow the section "How to reset the computer to start as usual after troubleshooting with clean boot" in the provided link to return your computer to Normal startup mode.

Hope it helps.