
Microsoft releases system updates from time to times and by default, our operating system has been set to check and install those updates automatically provided that computer is connected to the Internet.

Windows is very user-friendly operating system used by millions of users across the world and it has to install updates to keep it up to date and repair system vulnerabilities. These headlines below are quick links to detailed content: This article guides you through several cases on this error code and you can follow outlined solutions to fix the error. Though many cases report the same error code, causes and solutions to the specific issue vary widely and are case-by-case. It comes with error message produced by programs or system, through which we can identify the specific problem.

The error code 0x80070643 is also the error format of containing number and letter, which is similar to other Windows errors such as 0x80070002. How to recover deleted or lost data caused by 0x80070643 error?Ġx80070643 is a generic error that is likely to happen to many operations, such as Windows update installation, update or installation of Microsoft Security Essentials and other programs, Microsoft Office error, etc. It has also been confirmed by Gunsamaster, of whom started the original Microsoft OS checklist, and of whom found references to this build on some newsgroup archives, if I remember correctly, that it was by the time that Build 61d was compiled that Microsoft dropped Real Mode support in Windows 3.1.Case 1: Windows update error code 0x80070643Ĭase 2: Microsoft Security Essentials install or update error 0x80070643Ĭase 3: Error 0x80070643: Failed to install MSI package

I'm not sure if Build 26 is like this, though, because if I remember correctly, I tested Build 26 in Real Mode, and all of the applets functioned properly, and this was in DOSBox, by the way.

You could still use it nonetheless in Real Mode, however, for every applet of which dropped support for Real Mode, you would have to replace each of them with copies from a similar build of Windows, such as Windows 3.00a, of which still had full Real Mode support. On that note, Build 34e still supported Real Mode, which is no surprise, considering that both builds are quite close in functionality to Windows 3.00a (my fixed release of Build 34e used as many files from Windows 3.00a as possible, and worked quite well actually, which shows how close the early Windows 3.1 builds were to Windows 3.00a), however, in Build 34e, although it would boot up into Real Mode, most of the applications by that point were incompatible with Real Mode.
