October 29, 2020

Windows 10 KB4549951 caused BSOD/WiFi & Bluetooth bugs

3 min read

KB4549951 is a monthly security update released by Microsoft earlier. This update is mainly applicable to Windows 10 v1903 and v1909.

Of course, before installation, we have reminded everyone to turn on the system restore function, because by convention these cumulative updates will always bring about one or other problems.

It is no surprise that this monthly routine update once again caused problems such as the blue screen of death. Although not everyone will encounter it, there are currently many affected users.

As a routine update to fix security issues, Microsoft often emphasizes that users should install such updates in a timely manner, because it is necessary to repair and block known security vulnerabilities.

However, this update also has a variety of errors that cannot be installed normally, such as 0x8007000d, 0x800f081f, 0x80073701, and other common error codes.

This type of generic error code has almost no meaning to the user because even if you look for help, it is not easy to find a repair method that can be quickly installed.

Windows 10 October Update 2018

WiFi outage is also a very common problem in Windows 10. Previously, the cumulative update of the beta version launched by Microsoft had caused the WiFi speed to become 1Mbps.

The cumulative update of the stable version introduced this time brings similar problems. After some users install the WiFi, the upstream speed of WiFi drops significantly.

“I wanted to let you know that after installing this update “KB4549951″ my device no longer has a Bluetooth adapter according to Windows (which of course is false, since it still worked yesterday before installing this damn update,” one user told us in an email.

“I updated (KB4549951) my Window 10 on 15.04.20. After updating, Bluetooth stops working. Now Bluetooth is not showing in Device Manager. I tried to uninstall Updates but still, it is not showing. What to do now. My Laptop supports Bluetooth,” another user reported the same issue in Microsoft’s forum.

For this problem, users are advised to uninstall the update directly or use a restore point to restore it. If Bluetooth still does not work after restoration, please reinstall the driver.

Both the latest cumulative update of the beta version and the so-called stable version of the cumulative update are more likely to cause a blue screen of death issues.

When a user in the feedback community finds that certain tasks with high CPU load are carried out after repeated trials, the system will definitely appear with a blue screen of death and an error code.

Tasks with high CPU load here include watching live video, remote video conferencing.

The KERNEL MODE HEAP CORRUPTION error code also appears at the same time as the BSOD, which indicates that the system kernel seems to have an unexpected failure.

Other users said that apart from the blue screen of death, they did not encounter problems such as Bluetooth and wireless networks. If you are unlucky, you may encounter various problems.

From the past situation, even if the cumulative update has problems, Microsoft cannot fix it in time, because Microsoft may have to wait until the end of the month to release a new test update.

Therefore, it is totally unreliable to expect Microsoft to solve these problems as soon as possible. The simplest and most direct way for users is to directly uninstall the cumulative updates of these failures.

Via: windowslatest