Bwc.7z

(often found as CRU March 2020 by BWC.7z ) is a compressed archive containing a community-developed Root Certificate Update for legacy Windows operating systems, primarily Windows XP and Windows 2000. It was created by a well-known Japanese developer in the legacy Windows community who goes by the handle BlackWingCat (BWC). Purpose and Utility

: While widely used for Windows XP, different versions of the BWC certificate tool may be required for specific "extended kernels" or older versions like Windows 2000. "Your clock is ahead" error in Google Chrome on Windows XP. BWC.7z

: A batch script used to automate the installation of the certificates into the system registry. (often found as CRU March 2020 by BWC

: The primary certificate database file (often renamed to .cab during the installation process). "Your clock is ahead" error in Google Chrome on Windows XP

The archive typically includes the following files used for the manual update process:

: Always verify the source. BlackWingCat typically publishes updates on his official blog (usually in Japanese).