Regsvr32 is a command-line utility to register and unregister OLE controls, such as DLLs and ActiveX controls in the Windows Registry. Regsvr32.exe is installed in the %systemroot%\System32 folder in Windows XP and later versions of Windows.

The tool removes malicious software from an already-infected computer. Antivirus products block malicious software from running on a computer. It is significantly more desirable to block malicious software from running on a computer than to remove it after infection.

Microsoft is aware of new variants of the class of attack known as speculative execution side-channel vulnerabilities. The variants are named L1 Terminal Fault (L1TF) and Microarchitectural Data Sampling (MDS). An attacker who can successfully exploit L1TF or MDS may be able to read privileged data across trust boundaries.

This update allows Windows desktop applications that depend on the Windows 10 Universal CRT release to run on earlier Windows operating systems. Microsoft Visual Studio 2015 creates a dependency on the Universal CRT when applications are built by using the Windows 10 Software Development Kit (SDK).

Resolves a vulnerability in Windows Explorer that could allow remote code execution if a user visited a specially crafted webpage.

Update 4.0.3 for Microsoft .NET Framework 4 is now available. This update includes a set of new features and fixes some bugs, based on top customer requests and the .NET Framework scenarios. Notes. This update release updates only the runtime files for the Microsoft .NET Framework 4. For more information about the details of this update, see ...

This update prevents you from receiving error messages that are related to the application manifest expiry feature of the AD RMS clients. This fix is also necessary for Windows Rights Management clients. This update ensures continued compatibility between RMS-enabled applications and the RMS client. As a follow up to the Office 2003 Information ...

This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. Servicing stack updates (SSU) ensure that you have a robust and reliable servicing stack so that your devices can receive and install Microsoft updates.

The Distributed Component Object Model (DCOM) Remote Protocol is a protocol for exposing application objects using remote procedure calls (RPCs). DCOM is used for communication between the software components of networked devices. Hardening changes in DCOM were required for CVE-2021-26414.

To help keep Windows devices secure, Microsoft adds vulnerable bootloader modules to the Secure Boot DBX revocation list (maintained in the system UEFI-based firmware) to invalidate the vulnerable modules.