February 27, 2020—KB4535996 (OS Builds 18362.693 and 18363.693) https://support.microsoft.com/en-us/help/4535996/windows-10-update-kb4535996 Updates an issue that prevents the speech platform application from opening for several minutes in a high noise environment. Updates an issue that reduces the image quality in the Windows Mixed Reality (WMR) home environment. Updates an issue that might prevent ActiveX content from loading. Improves the battery performance during Modern Standby mode. Updates an issue that causes Microsoft Narrator to stop working when a user session is longer than 30 minutes. Addresses an issue that adds an unwanted keyboard layout as the default after an upgrade even if you have already removed it. Updates an issue that prevents the Windows Search box from rendering properly. Updates an issue that prevents the printer settings user interface from displaying properly. Updates an issue that prevents some applications from printing to network printers. For other Improvements and fixes please refer to Support Article linked above. February 27, 2020-KB4537572 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 Version 1903 and Windows Server 1903 RTM and Windows 10, version 1909 and Windows Server, version 1909 https://support.microsoft.com/en-us/help/4537572/kb4537572-cumulative-update-for-net-framework For Quality and reliability improvements please refer to Support Article linked above. Edit: For further information on Optional Updates refer to post of Sumit - Insider MVP in this thread. https://answers.microsoft.com/message/37e4a0e3-a459-44e4-bc83-62bc8ea6e15e?threadId=612f510a-0b26-4281-9f94-34b53ae98275 Edit 2.0: Additional update for Windows Defender. KB4052623 Update for Windows Defender antimalware platform

https://support.microsoft.com/en-us/help/4052623/update-for-windows-defender-antimalware-platform This package includes monthly updates and fixes to the Windows Defender antimalware platform that is used by Windows Defender Antivirus in Windows 10. Monthly updates are installed in addition to major Windows 10 releases. Both types of updates should be installed to ensure continued protection against malware and other threats. Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question. Anonymous 2020-02-29T10:28:34+00:00 I just had this update on my PC and now it will not boot. Fails the BIOS POST test with a series of beeps, completely blank screen. I bought it only 5 days ago, have tried re-seating the RAM and GPU. Hard to decipher the beeps as the screen is blank and I dont know what MB make it is. (8 regular slow beeps. Then a repeat of two slow low tone beeps, two fast high tone beeps - if that means anything to anyone!) I did have some important work to do, but I guess not, thanks microsoft :( I presume there is no way to fix this and the PC is now dead, as it wont ever boot up again now, to receive a Windows update fix ... to fix this "update fix"? 0 comments No comments Report I just had this update on my PC and now it will not boot. Fails the BIOS POST test with a series of beeps, completely blank screen. I bought it only 5 days ago, have tried re-seating the RAM and GPU. Hard to decipher the beeps as the screen is blank and I dont know what MB make it is. (8 regular slow beeps. Then a repeat of two slow low tone beeps, two fast high tone beeps - if that means anything to anyone!) I did have some important work to do, but I guess not, thanks microsoft :( I presume there is no way to fix this and the PC is now dead, as it wont ever boot up again now, to receive a Windows update fix ... to fix this "update fix"? Anonymous 2020-02-28T02:59:56+00:00 Please stop pushing updates on me! I am tired of them. I like the way Windows runs right now...I am not a Luddite, I just don't want the any more wonkyness or weird Chromium hybrid crapshoots. Please, let me be! In seven days, I don't want to have this argument again! If I have to, I'll look for legal means....please just stop!!! 0 comments No comments Report Please stop pushing updates on me! I am tired of them. I like the way Windows runs right now...I am not a Luddite, I just don't want the any more wonkyness or weird Chromium hybrid crapshoots. Please, let me be! In seven days, I don't want to have this argument again! If I have to, I'll look for legal means....please just stop!!! Anonymous 2020-03-01T06:07:29+00:00 This update has messed up my windows os. I can't open any applications and Windows powershell(admin). Only browser works. What a mess this Windows update has made. How to fix this issue?? 0 comments No comments Report This update has messed up my windows os. I can't open any applications and Windows powershell(admin). Only browser works. What a mess this Windows update has made. How to fix this issue?? Anonymous 2020-02-29T14:18:06+00:00 Well, ONE part of this update is optional and is offered as such. The rest isn't. ~bhringer Well, how does one selectively NOT install optional updates? 0 comments No comments Report Well, ONE part of this update is optional and is offered as such. The rest isn't. Well, how does one selectively NOT install optional updates? Anonymous 2020-03-02T23:43:06+00:00 The latest Microsoft update has caused my audio to stop working. This is not the first time an update has caused a problem with my pc. If updates continue to cause problems with my pc, I will want to refuse additional updates. HELP me restore my sound! 0 comments No comments Report The latest Microsoft update has caused my audio to stop working. This is not the first time an update has caused a problem with my pc. If updates continue to cause problems with my pc, I will want to refuse additional updates. HELP me restore my sound!