The Windows 10 KB4556799 is another update that has proven problematic for some users. The KB4556799, which is an important security update, causes audio problems and temporary data loss. See how to fix the errors.
But we have to report it every time it happens: The users who run the update Windows May 10, 2019 and the November 2019 update report that update KB4556799 is problematic with a wide range of failures, such as a damaged audio adapter, a temporary user profile, a blue screen, and even a non-informative error message during the installation process.
These problems seem to vary from person to person and do not affect every installation Windows 10. According to with user reports, τα Windows 10 restore all audio driver configurations and even remove its audio driver Realtek. Others noted that their audio devices did not transmit audio during the installation of the update.
1. Right-click the volume icon on the taskbar.
2. Open the toy audio settings.
3. Click on "Sound Control Panel" (Sound Control Panel) in Settings.
4. On the Playback tab, right-click the speakers Realtek to open the Properties dialog box.
5. On the Advanced tab, turn off the “Audio enhancements” option.
6. Click "OK" to apply the changes.
You may also need to turn off all audio enhancements for other audio devices.
Changing their sound settings Windows 10 so that the quality is 16-bit, it could also solve some of the problems.
If none of the above work for you, you should cancel the update completely and pause the automatic updates until a new, more accurate update is available. This can be accomplished by going to the Update and Security page in Settings, and from there to Advanced Options.
Temporary user profile (data loss)
Sound problems are not the only problems with information KB4556799, with some claiming that the update has been deleted their data and files, and that their images or documents are missing.
It is worrying that data is suddenly missing and all operating system settings are set by default, but the good news is that profile and data, including desktop customizations, still exist.
The Windows 10 load a temporary user profile during the update installation process, instead of the normal user profile. As a result, users have noticed that their desktop customization, pinned taskbar applications, or files in folders such as Docs and Images have disappeared.
The data, including files and images, is still there, but it belongs to the main user profile and you will not see the folders when Windows 10 load with a new temporary profile.
The temporary issue of user profile has been mentioned many times in the forum and the Comment Center, but the Microsoft has not officially documented the error. It is not clear how the updates enable the temporary user profile, but there is a solution that still works.
To fix the temporary user profile problem, restart the affected system six to eight times (!!! yes! So many times). This solution seems to have helped some users, but it may not work for everyone.
The most consistent option is to simply uninstall the update by following these steps:
1. Open Settings> Update & Security> View Update History
2. Click "Uninstall Updates"
3. Using the search box, search for the update package.
4. Check the update and right-click on it.
5. Click the "Uninstall" button.
6. Click "Yes" to confirm your decision.
7. Restart your computer when required.
If you have other problems with the update or need more help, let us know in the comments below.